I'm still on cuck mode on my pixel, it's nice having a good camera which is like half of the cost of the phone, was never able to get it working on GrapheneOS
Discussion
Native Graphene camera work great, especially on newer devices like 6 and 7 series. If you require the google camera (and gallery) app you can install that on GOS using sandboxed play services. In daylight its almost on par. I run google camera in a seperate isolated profile, but have not used that for over 1 year