Running the demo here: https://developer.xamarin.com/samples/xamarin-forms/Navigation/MasterDetailPage/
On UWP once you have chosen a item on the master the detail is shown how do you get back to seeing the master list? (i.e. go back and reshow the master/detail list) See here for an example: https://www.screencast.com/t/MO1zXr2p
This seems very different to the android/ios version.