A fix to make https://briancaos.wordpress.com/2017/05/01/sitecore-caching-clear-caches-individually/ work on Sitecore 10, plus a quick hack to view the contents of each cache (for data that can be easily displayed)

AdvancedCache.aspx

<%@ page language="c#" enableeventvalidation="false" autoeventwireup="true" enableviewstate="false" %>

<%@ import namespace="System.Security.Permissions" %>
<%@ import namespace="System.Collections.Generic" %>
<%@ import namespace="System.Threading" %>
<%@ import namespace="System.Security.Principal" %>
<%@ import namespace="Newtonsoft.Json" %>
<%@ import namespace="Sitecore.Data.Items" %>

<script runat="server">
  void Page_Load(object sender, System.EventArgs e)
  {
    Response.Buffer = false;
    Response.BufferOutput = false;
    DataBind();
  }

  IEnumerable<Sitecore.Caching.ICacheInfo> Caches
  {
    get
	{
	  string name = Request.QueryString["name"];
	  if(!string.IsNullOrWhiteSpace(name))
	  {
	    return Sitecore.Caching.CacheManager.GetAllCaches().Where(c => c.Name.StartsWith(name)).OrderBy(c => c.Name);
	  }
	  
	  return Sitecore.Caching.CacheManager.GetAllCaches().OrderBy(c => c.Name);
    }
  }

  double PercentageUsed(Sitecore.Caching.ICacheInfo cache)
  {
    if (cache.MaxSize == 0)
      return 0;
    return Math.Round(((double)cache.Size/(double)cache.MaxSize*100), 0);
  }

  string PercentageColor(double percentage)
  {
    if (percentage >= 0 && percentage <= 50)
      return "green";
    if (percentage >= 50 && percentage <= 75)
      return "orange";
    return "red";
  }

  private void repCaches_Command(object source, RepeaterCommandEventArgs e)
  {
    switch (e.CommandName)
    {
      case "ClearCache":
        string cacheName = e.CommandArgument as string;
        var cache = Sitecore.Caching.CacheManager.GetAllCaches().Where(c => c.Name == cacheName).FirstOrDefault();
        if (cache == null)
        {
          Response.Write("<div>NULL</div>");
        }
        else
        {
          cache.Clear();
          repCaches.DataBind();
        }
        break;
      case "ViewCache":
        string cn = e.CommandArgument as string;
        var cc = Sitecore.Caching.CacheManager.GetAllCaches().Where(c => c.Name == cn).FirstOrDefault();
		if(cc == null)
		{
		    Response.Write("<div>NULL</div>");
			return;
		}
		if(cc is Sitecore.Caching.Generics.ICache<string>)
		{
		    Enumerate<string>(cc);
		}
        else if(cc is Sitecore.Caching.Generics.ICache<Sitecore.Data.ID>)
        {
            Enumerate<Sitecore.Data.ID>(cc);
        }
		else if(cc is Sitecore.Caching.Generics.ICache<Sitecore.Caching.ItemPathCacheKey>)
        {
            Enumerate<Sitecore.Caching.ItemPathCacheKey>(cc);
        }
        else
		{
		    Response.Write("<div>Type: " + cc.GetType() + "</div>");
		}
        Response.End();
        break;
    }
  }

  void Enumerate<T>(Sitecore.Caching.ICacheInfo cache)
  {
    var cc = cache as Sitecore.Caching.Generics.ICache<T>;
    Response.Write("<h2>Cache type: " + string.Join(", ",cc.GetType().GetInterfaces().Select(t=>GetTypeName(t))) + "</h2>");
    var keys = cc.GetCacheKeys();
    if(keys.Length == 0)
    {
        Response.Write("<div>Empty</div>");
        return;
    }
    Response.Write("<table border=2 cellpadding=3>");
	foreach(var key in keys)
	{
      Response.Write("<tr>");
	  var value = cc[key];
	  if(value == null)
	  {
		Response.Write("<td>" + key + "</td><td>null</td>");
	  }
	  else if(value is Sitecore.Data.Items.Item)
	  {
		var i = (Item)value;
		Response.Write("<td>" + key + "</td><td>Item:" + i.Paths.Path + "</td>");
	  }
	  else if(value is string)
	  {
		Response.Write("<td>" + key + "</td><td>" + value + "</td>");
	  }
	  else if(value is System.Runtime.Serialization.ISerializable)
	  {
		Response.Write("<td>" + key + "</td><td>" + JsonConvert.SerializeObject(value) + "</td>");
	  }
	  else
	  {
		Response.Write("<td>" + key + "</td><td>" + value + "</td>");
	  }
      Response.Write("</tr>");
	}
    Response.Write("</table>");
  }

  long TotalMaxSize()
  {
    long ac = 0;
    foreach (var cache in Caches)
      ac = ac + cache.MaxSize;
    return ac;
  }

  long TotalSize()
  {
    long ac = 0;
    foreach (var cache in Caches)
      ac += cache.Size;
    return ac;
  }

  double TotalPercentageUsed()
  {
    if (TotalMaxSize() == 0)
      return 0;
    return Math.Round(((double)TotalSize()/(double)TotalMaxSize()*100), 1);
  }

    public static string GetTypeName(Type type)
    {
        if (!type.IsGenericType)
            return GetNestedTypeName(type);

        StringBuilder stringBuilder = new StringBuilder();
        _buildClassNameRecursiv(type, stringBuilder);
        return stringBuilder.ToString();
    }

    private static void _buildClassNameRecursiv(Type type, StringBuilder classNameBuilder, int genericParameterIndex = 0)
    {
        if (type.IsGenericParameter)
            classNameBuilder.AppendFormat("T{0}", genericParameterIndex + 1);
        else if (type.IsGenericType)
        {
            classNameBuilder.Append(GetNestedTypeName(type) + "[");
            int subIndex = 0;
            foreach (Type genericTypeArgument in type.GetGenericArguments())
            {
                if (subIndex > 0)
                    classNameBuilder.Append(":");

                _buildClassNameRecursiv(genericTypeArgument, classNameBuilder, subIndex++);
            }
            classNameBuilder.Append("]");
        }
        else
            classNameBuilder.Append(GetNestedTypeName(type));
    }

    public static string GetNestedTypeName(Type type)
    {
        if (!type.IsNested)
            return type.Name;

        StringBuilder nestedName = new StringBuilder();
        while(type != null)
        {
            if(nestedName.Length>0)
                nestedName.Insert(0,'.');

            nestedName.Insert(0, _getTypeName(type));

            type = type.DeclaringType;
        }
        return nestedName.ToString();
    }

    private static string _getTypeName(Type type)
    {
        return type.IsGenericType ? type.Name.Split('`')[0]: type.Name;
    }
</script>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<html>
<head>
    <title>Cache Plus</title>
    <style type="text/css">
        body {
            font: normal 12pt arial, verdana;
            padding: 20px;
        }

        .box {
            padding: 20px;
            margin: 20px;
            border: solid 1px black;
            background-color: #efefef;
        }

        input {
            height: 30px;
            width: 100px;
        }

        td {
            border-bottom: solid 1px #aaa;
            padding-right: 20px;
            padding-left: 5px;
            padding-top: 5px;
            padding-bottom: 5px;
        }

        table {
            width: 100%;
        }

        thead td {
            font-weight: bold;
            border-bottom: solid 1px #aaa;
            padding-right: 20px;
        }
    </style>
</head>
<body style="font-size: 14px">
    <form runat="server">

        <div style="padding: 20px; background-color: #eaeaea; border-bottom: solid 1px #777777; font-size: 16px">
            <%# Sitecore.MainUtil.FormatSize(TotalSize(),false) %> of <%# Sitecore.MainUtil.FormatSize(TotalMaxSize(),false) %> used <strong>(<%# TotalPercentageUsed() %>%)</strong>
        </div>
        <asp:Repeater ID="repCaches" runat="server" EnableViewState="false" OnItemCommand="repCaches_Command" DataSource="<%# Caches %>">

            <headertemplate>
                <table>
                    <thead>
                        <tr>
                            <td>Name</td>
                            <td></td>
                            <td>Size</td>
                            <td>MaxSize</td>
                            <td>% Used</td>
                        </tr>
                    </thead>
            </headertemplate>
            <footertemplate>
                </table>
            </footertemplate>

            <itemtemplate>
                <tr>
                    <td style="width: 250px">
                        <a href="?name=<%# (Container.DataItem as Sitecore.Caching.ICacheInfo).Name %>">
                            <%# (Container.DataItem as Sitecore.Caching.ICacheInfo).Name %>
                        </a>
                    </td>
                    <td style="width: 100px">
                        <asp:Button ID="btnClearCache" runat="server" CommandArgument="<%# (Container.DataItem as Sitecore.Caching.ICacheInfo).Name %>" CommandName="ClearCache" text="Clear Cache" />
                        <asp:Button ID="btnViewCache" runat="server" CommandArgument="<%# (Container.DataItem as Sitecore.Caching.ICacheInfo).Name %>" CommandName="ViewCache" text="View Cache" />
                    </td>
                    <td style="text-align: right; width: 80px">
                        <%# Sitecore.MainUtil.FormatSize((Container.DataItem as Sitecore.Caching.ICacheInfo).Size,false) %>
                    </td>
                    <td style="text-align: right; width: 80px">
                        <%# Sitecore.MainUtil.FormatSize((Container.DataItem as Sitecore.Caching.ICacheInfo).MaxSize,false) %>
                    </td>
                    <td>
                        <div style="width: <%# PercentageUsed((Container.DataItem as Sitecore.Caching.ICacheInfo)) %>%; height: 30px; background-color: <%# PercentageColor(PercentageUsed((Container.DataItem as Sitecore.Caching.ICacheInfo))) %>; float: left;"></div>
                        <div style="width: <%# (100 - PercentageUsed((Container.DataItem as Sitecore.Caching.ICacheInfo))) %>%; height: 30px; background-color: #ccffcc; float: left;"></div>
                    </td>
                </tr>
            </itemtemplate>

        </asp:Repeater>
    </form>
</body>
</html>