Can WidgetKit use BlurView as its background

I have a problem when I use BlurView as my View's background,it will only show the placeholder View when i use BlurView.
My code:

Code Block Swift
WidgetView().background(BlurView(style: .systemThinMaterial))
//BlurView can be used in my app's View perfectly


So,isn't widgkit support it?Or I get a wrong way?
If I might state this question slightly differently, some of Apple's widgets (Shortcuts, battery) use a background which appears to be something like .systemThinMaterial, but none of the ways I have tried to apply it to the background have worked.

  1. Is there a way for non-Apple widgets to do this?

  2. If so, how?

Can WidgetKit use BlurView as its background
 
 
Q