How to access BottomNavigationView from TabbedView handler?

[ArtemAI]

I have TabbedPage custom renderer that allows me to add a badge to menu items. It works as expected in MAUI app, but in order to resolve the problem caused by bug #9743 I have to migrate this renderer to handler. The issue is that I can't figure out how to access BottomNavigationView instance and call GetOrCreateBadge() method from handler. Please advise on how it can be achieved.

Here is how it is done in custom renderer (simplified):

public class TabbedPageRenderer : TabbedPageRenderer
{
    private UpdateBadgeInfo? _updateBadgeInfo;
    private BottomNavigationView? _bottomNavigationView;

    protected override void OnLayout(bool changed, int l, int t, int r, int b)
    {
        base.OnLayout(changed, l, t, r, b);

        var children = GetAllChildViews(this);
        if (children.SingleOrDefault(x => x is BottomNavigationView) is BottomNavigationView bottomNav)
        {
            _bottomNavigationView = bottomNav;
        }
    }

    private List<View> GetAllChildViews(View view)
    {
        if (view is not ViewGroup group)
        {
            return new List<View> { view };
        }

        var result = new List<View>();

        for (int i = 0; i < group.ChildCount; i++)
        {
            var child = group.GetChildAt(i)!;

            var childList = new List<View> { child };
            childList.AddRange(GetAllChildViews(child));

            result.AddRange(childList);
        }

        return result.Distinct().ToList();
    }

    private void UpdateBadge(UpdateBadgeInfo updateBadgeInfo)
    {
        if (_bottomNavigationView is not null)
        {
            var menuItem = _bottomNavigationView!.Menu!.GetItem(_updateBadgeInfo.TabNumber);
            var badge = _bottomNavigationView.GetOrCreateBadge(menuItem!.ItemId);
            badge.BackgroundColor = StyleResourcesHelper.BlueRibbon.ToAndroid();
        }
    }
}

[maonaoda]

Currently cannot be accessed through normal methods because the direct methods have been removed or changed to non-exposed。
Can't understand the reason for doing this without giving an alternative。
#4893

[konradzuse]

it is a problem for me also.
I'm working around it by using reflection on the TabbedPage to access the internal members...

var tabbedPageManager =
            typeof(TabbedPage)
                .GetField("_tabbedPageManager", BindingFlags.NonPublic | BindingFlags.Instance)?
                .GetValue(VirtualView);

        if (tabbedPageManager != null)
        {
            BottomNavigationView? navView = (BottomNavigationView?)tabbedPageManager.GetType()
                .GetProperty("BottomNavigationView", BindingFlags.NonPublic | BindingFlags.Instance)
                ?.GetValue(tabbedPageManager);

        }

[ArtemAI]

Works for me as well, thanks!