Interact with background while presenting sheet

gistfile1.txt

@available(iOS 16.0, *)
extension View {

    func presentationDetents(
        undimmed detents: Set<PresentationDetent>
    ) -> some View {
        self.presentationDetents(detents)
            .background(UndimmedDetentView())
    }

    func presentationDetents(
        undimmed detents: Set<PresentationDetent>,
        selection: Binding<PresentationDetent>
    ) -> some View {
        self.presentationDetents(detents, selection: selection)
            .background(UndimmedDetentView())
    }
}

class UndimmedDetentController<Content: View>: UIHostingController<Content> {

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        sheetPresentationController?.largestUndimmedDetentIdentifier = .large
        sheetPresentationController?.preferredCornerRadius = 30
        parent?.presentingViewController?.view.tintAdjustmentMode = .normal
    }
}

@available(iOS 16.0, *)
struct UndimmedDetentView: UIViewControllerRepresentable {

    var largestUndimmedDetent: PresentationDetent?

    func makeUIViewController(context: Context) -> UIViewController {
        UndimmedDetentController(rootView: Color.clear)
    }

    func updateUIViewController(_ uiViewController: UIViewController, context: Context) {
    }
}