I am trying to add a AppBar to a Xamarin Forms Application targeting the UWP platform. From what I understand UWP has a top an bottom app bar definde on the page and therefore I would like to access it. As it is not possible to do it directly I think I need a custom renderer for the NavigationPage - the same thing was also necessary for the project's iOS page.
When I tried to follow the reciepie that I have used in the iOS and Andoid application to modify the layout of the NavigationPage I found that this is not possible as most of the methods are private or not overridable in the UWP NaviationPageRenderer.
So is there a some guidance how to modify the NavigationPage of an UWP application or is this the wrong approach all together? I spent extensive time on the internet and so far have not found any solution.
A sample putting me in the right direction would be much appreciated.