component.razor

   <div class="panels">
       @{
           int index = 0;
       }
   <MudExpansionPanels MultiExpansion="true" >
       @foreach (var position in ViewModel.Entities)
       {
           @if (index == 0)
           {
               <MudCard Class="thin-panel">

                   <MudExpansionPanel [email protected] Expanded="true">
                       <ProjectView ViewModel=position />
                   </MudExpansionPanel>
               </MudCard>
           }
           else
           {
               <MudCard Class="thin-panel">

                   <MudExpansionPanel [email protected]>
                       <ProjectView ViewModel=position />
                   </MudExpansionPanel>
               </MudCard>
           }
           index++;
       }
   </MudExpansionPanels>
   </div>