Is there any equivalent of HTML.RAW in Blazor?

To render raw HTML in Blazor, wrap the HTML content using the MarkupString type. This allows the HTML or SVG to be rendered as part of the DOM. 

 @page "/"
  
  
 @((MarkupString)myMarkup)
  
 @code {
     private string myMarkup =
         "<p class='markup'>This is a <em>markup string</em>.</p>";
 }

Refer to the Blazor documentation for more information.