import SwiftUI extension Backport where Content: View { @ViewBuilder func toolbarBackground(_ color: Color) -> some View { if #available(iOS 16, *) { content .toolbarBackground(color, for: .navigationBar) } else { content } } @ViewBuilder func toolbarBackgroundVisibility(_ visible: Bool) -> some View { if #available(iOS 16, *) { content .toolbarBackground(visible ? .visible : .hidden, for: .navigationBar) } else { content } } }