When using a NavigationStack, the path is updated immediately when navigation happens via NavigationLink, but a change to the path triggered via the back button can only be seen (detected programmatically) after the transition animation ran.

I want update another view that’s next to the NavigationStack on iPad in parallel when navigation happens, but with the obvious means this always happens with a significant delayed when navigation happens through the back button.

Is this possible? Is there a way to detect a change to the path immediately when it happens in all cases?

Code snippet to observe the update behavior of the path-Binding of a NavigationStack:

@Observable class ExampleModel {
    var navPath: [Int] = [] {
        didSet {
            print("navPath changed: ", navPath)
        }
    }
}

struct ContentView: View {
    @State var model = ExampleModel()

    var body: some View {
        NavigationStack(path: $model.navPath) {
            ListExampleView()
                .navigationDestination(for: Int.self) { value in
                    Text(String(value))
                }
        }
    }
}

struct ListExampleView: View {
    var body: some View {
        List {
            ForEach(0 ..< 30) { item in
                NavigationLink(value: item) {
                    Text("Hello, world!")
                }
            }
        }
        .navigationBarTitle("Example")
        .listStyle(.plain)
    }
}

#Preview {
    ContentView()
}