CurrentNavigationService cannot be set in Custom Tabbed Navigation

[jmbowman1107]

I have implemented a custom tabbed navigation container, and I am unable to set the CurrentNavigationService as it is an internal set which results in NRE when trying to change the tab.

[OzaS]

Same with PopPageModel() if Page was open not in the TabContainer, but in parent NavigationContainer. On Forms this solution have worked for years now