How to access the base navigation glass mvvm light

I know the basic Xamarin.form navigation pane can be accessed.

Using the following API

Var navigation = Application.Current.MainPage.Navigation;

Var firstPageToRemove = navigation.NavigationStack[2];

      

        
        
        
      

    

But how can I access the underlying MVVM navigation stack Since InavigationService provides very little API to manage the navigation stack