Viewfinder should show "zoomed" preview instead of respecting aspect ratio of lens
Mismatch between selected image quality (megapixels) results in the viewfinder preview staying in the top of the app instead of filling in the usual space while leaving the bottom bar for capture, camera switch etc buttons.
Here's an obvious comparison with 1:1 and 16:9 image qualities selected which shows how much smaller the viewfinder preview gets with these higher qualities that differ from the device screen aspect ratio: