Yeah I’m with you there, the pixel camera app is a must for me too. What I love about GrapheneOS is how easy it is to block permissions. So with google pixel camera app, no network and no location permissions means that it cannot report back to google unless I allow it to. It’s a safe way to use the odd google app in a limited way when you need to. The other google app I use is the g-keyboard, because it is so much better in some ways. But again it is very restricted and I turned off the features I don’t want, like voice typing.