Artisto
The standard camera takes decent photos and videos and regularly receives new features (e.g. night mode, EIS, HDR).
You can find more information about the camera here.
However, there are some limitations (e.g. no 4k 60fps) and some features such as blur, slow motion, timelapse are (still) missing. If such features are important to you, you could get a little more out of the hardware by installing the Pixel Camera app (formerly Google Camera), for example.
The great thing about GrapheneOS is that you can use this Google app in a relatively privacy-friendly way: Pixel Camera even runs without sandboxed Google Play and, more recently, without GSF; many users here also revoke the app's network permissions.
If you want to see a decent comparison of the Pixel 6's camera, I can recommend this video - or -even better- form your own opinion and compare the standard camera with the Pixel Camera on your Pixel 7 yourself.