I have a project where I am upgrading my Apple Watch app to use SwiftUi and the SwiftUI lifecycle. For some reason, my destination views are missing the back button (<) and the navigation title. It all works fine with NavigationView, but I definitely want to go to NavigationStack and use the new API.
I filled a bug report on this. FB10908690 (NavigationStack - No Back Button)
To be complete, it's missing the title and I guess the whole navigation bar.
I'm using Version 14.0 beta 4 (14A5284g) of Xcode.
Fixed by deleting watch target and adding it back in. Now the watch doesn't receive messages, but this issue is resolved.
The newly added Watch App had some build settings to set. Now it works fine and uses a NavigationStack!