Pages with NavigationView

[valoral]

Hi,
I'm quite new to UNO. I would like to show different pages when selecting an item in the NavigationView control. Those pages might lead to other pages so I would like to also implement the back button in the NavigationView.

Example:

NavigationView ---> Page1 <---> Page3 (List of entries) <---> Page4 (Add an entry to the list)
               ---> Page2 (list of items) <---> Page5 (add item)
               ...

So far the implementation that could get closer to what I'm trying to do is:

        <NavigationView x:Name="MainNavigationView" uen:Region.Attached="true"
                        IsBackEnabled="true"
                        BackRequested="NavigationView_BackRequested">
            <NavigationView.MenuItems>
                <NavigationViewItem Content="Page1" uen:Region.Name="-/Page1" />
                <NavigationViewItem Content="Page2" uen:Region.Name="-/Page2" />
            </NavigationView.MenuItems>

            <Frame x:Name="DisplayFrame" uen:Region.Attached="True"/>
        </NavigationView>

        private void NavigationView_BackRequested(NavigationView sender, NavigationViewBackRequestedEventArgs args)
        {
            _ = navigator?.NavigateBackAsync(sender);
        }

            routes.Register(
                new RouteMap("", View: views.FindByViewModel<ShellViewModel>(),
                    Nested: new RouteMap[]
                    {
                    new RouteMap("Main", View: views.FindByViewModel<Presentation.ViewModel.MainViewModel>()),
                    new RouteMap("NavView", View: views.FindByViewModel<Presentation.ViewModel.NavViewViewModel>(),
                        Nested: new RouteMap[]
                        {
                            new RouteMap("Page1", View: views.FindByView<Presentation.NavView1Page>()),
                            new RouteMap("Page2", View: views.FindByView<Presentation.NavView2Page>()),
                        })
                    })
            );

The switching between pages seems to work, but the navigate back does not. It brings me to the Main page (moving away from page with the NavView) instead of going back in the child Frame.
I did several different attempts but they all failed in different ways.

How should I implement the NavigationView_BackRequested? Is my implementation correct so far?
Sorry for such a basic question,

Thanks in advance

[valoral]

So far I could do it this way:

    private void NavigationView_BackRequested(NavigationView sender, NavigationViewBackRequestedEventArgs args)
    {
        INavigator? navigator = DisplayFrame.Navigator();
        if (navigator is FrameNavigator fn)
        {
            if (fn.CanGoBack)
            {
                _ = navigator?.NavigateBackAsync(DisplayFrame);
            }
        }
    }

Is there a better solution?