ios – accessibilityViewIsModal in swiftUI

I’ve used accessibilityViewIsModal - true in UIKit where I need to shift accessibility focus from one view to another subview. How to use accessibilityViewIsModal in swiftUI?

I’ve tried following techniques to shift accessibility focus from one view to another subview.

• UIAccessibility.post(notification: .screenChanged, argument: “New Screen appear”)

Result: Accessibility focus didn’t change

• accessibilityViewIsModal = true

Result: Compile time error: Cannot find ‘accessibilityViewIsModal’ in scope

if showSelectPolicyView {
                SelectPolicyView(input: $inputData, showSelectPolicyView: $showSelectPolicyView)
                    .transition(.move(edge: .bottom))
                    .clipped()
                    .zIndex(1)
                    .background(Color.gray)
                    .onAppear {
                        accessibilityViewIsModal = true
                    }.onDisappear() {
                        accessibilityViewIsModal = true
                    }
            }

Where and how to use accessibilityViewIsModal in swiftUI ?