As for camera apps, the stock GrapheneOS camera app is a bit clunky, I just download the stock Android "Camera" off of the Play Store...
The "stock Android camera" (the one in AOSP) is absolutely horrible. You're probably using Google's Pixel camera app.
https://grapheneos.org/usage#grapheneos-camera-app
> GrapheneOS includes our own modern camera app focused on privacy and security. It includes modes for capturing images, videos and QR and barcode scanning along with additional modes based on CameraX vendor extensions (Portrait, HDR, Night, Face Retouch and Auto) on devices where they're available (Pixels currently only have support for Night mode).
I am indeed using the "Pixel Camera" app, which I would consider the "stock camera" for Pixel devices. It is just labelled as "Camera" in the app drawer.