I have a fullScreenCover, which then presents another sheet on top of it. I want this sheet to be translucent so I can apply materials over it. I had it working here:

struct ClearBackgroundView: UIViewRepresentable {
    func makeUIView(context: Context) -> some UIView {
        let view = UIView()
        DispatchQueue.main.async {
            view.superview?.superview?.backgroundColor = .clear
        }
        return view
    }
    
    func updateUIView(_ uiView: UIViewType, context: Context) {
    }
}

struct ClearBackgroundViewModifier: ViewModifier {
    
    func body(content: Content) -> some View {
        content
            .background(ClearBackgroundView())
    }
}

extension View {
    func clearModalBackground() -> some View {
        self.modifier(ClearBackgroundViewModifier())
    }
}

This is then called on a view like so:

StopDetail(coreStop: stop)
                .clearModalBackground()
                .background(
                        Color.background.opacity(0.7)
                            .ignoresSafeArea()
                            .background(.ultraThinMaterial))

This method works whenever the view isn't inside a fullScreenCover. If it's being presented from a fullScreenCover, this won't work, and the view will have a normal background as if my code doesn't do anything. From the hierarchy debugger, the view that's adding the background appears to be a PresentationHostingController (class UIHostingView).

How can I fix this?