An example of the web library I found

StaxelnewWebRender.cs

        private static bool loaded = false;
        private static bool renderReady = false;
        private static Texture2D _texture;

        private static Page page;

        private static DeviceContext _context;

        private static SpriteBatch spriteBatch;

        [HarmonyPatch(typeof(StaxelGame))]
        [HarmonyPatch("Draw")]
        private class DrawOverride {
            static void Prefix(StaxelGame __instance, GameTime gameTime) {
                if (!loaded) {
                    _context = __instance.GetPrivateFieldValue<DeviceContext>("_context");
                    spriteBatch = new SpriteBatch(_context.Graphics.GraphicsDevice);
                    var task = new Task(async () => {
                        await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);
                        var browser = await Puppeteer.LaunchAsync(new LaunchOptions {
                            Headless = true,
                            Args = new string[] {"--no-sandbox"}
                        });
                        page = await browser.NewPageAsync();
                        await page.SetViewportAsync(new ViewPortOptions {
                            Width = _context.Graphics.PreferredBackBufferWidth,
                            Height = _context.Graphics.PreferredBackBufferHeight
                        });
                        await page.GoToAsync("https://google.com");
                        renderReady = true;
                    });
                    task.Start();
                    loaded = true;
                }
            }
            
            static void Postfix(StaxelGame __instance, GameTime gameTime) {
                UIManager.Draw(_context);

                if (!renderReady) {
                    return;
                }

                if (_texture == null || _texture.IsDisposed) {
                    _texture = Texture2D.FromStream(_context.Graphics.GraphicsDevice, page.ScreenshotStreamAsync().Result);
                }
                
                spriteBatch.Begin();
                spriteBatch.Draw(_texture, Vector2.Zero, Color.White);
                spriteBatch.End();
            }
        }