CountAndroidViews.cs

using Android.Views;

public int Count = 0;

public void Iterate(View view) {
    if (view is ViewGroup)
        IterateViewChildren(view);
    
    System.Console.WriteLine($"Total Children {Count}");
}

private void IterateViewChildren(View view) {
    if (view is ViewGroup) {
        
        ViewGroup vGroup = (ViewGroup)view;
        for (int i = 0; i < vGroup.ChildCount; i++) {
            View vChild = vGroup.GetChildAt(i);
            IterateViewChildren(vChild);
        }
    }
    Count++;
}

Iterate(selectedView);