This issue was filed on the MAUI github repo, you can track on this issue:Load an SVG from web URL · Issue #10050 · dotnet/maui · GitHub
I find a workaround that you can use
<webview> to display this SVG file from the URL.
<WebView WidthRequest="50" HeightRequest="50" Source="https://www.yourwebsite.com/test.svg">
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