@Vision Pro Engineer I have submitted a Feedback Post with a code sample for this issue. FB22536529.
Please note, this Feedback Post is one of many variations of the problem, using an If/Else not NavigationStack, where tapping the screen allows the camera feed to appear. However, in other cases the camera never appears.
I will create additional Feedback Posts for those other cases, once I can isolate the code into repeatable sections.