I remember having a lot of trouble with cameras way back in the days of my first Graphene install (2+ years). I installed Open Camera and this solved most of it, but took a while to get working properly.
I now have Pixel 5 and I need something a bit more advanced than the GOS default camera. I installed Open Camera and the shutter is so slow, takes 5-10 seconds to take a shot. I changed to the Camera2API and that didn't improve it.
Any suggestions? If not I may just go with Google Camera with sandboxed GPS/GSF but I would much rather use OpenCamera and not have a single Google app installed.