iPhone Camera bug
The only way I could get the iPhone camera to work again was to reboot the phone.
I’ve seen camera bugs before; this one makes it completely unusable. The controls do not work, nor can one switch to another shooting mode, presumably because one has to press someplace completely different than the offset controls which are drawn in the wrong place.
Reliability bugs like this are troubling and I’m not keen on the cross pollination of iOS and macOS, which can only make things worse.