"The best drivers for your device are already installed" when trying to manually install the android usb driver. My pixel 3a initially had CalyxOS, and connecting the phone to my computer while it was in fastboot fixed this issue.
However, I'm back at stock android, and doing that same method just makes the phone not show up in Device Manager. OEM unlocking is enabled, so is usb debugging. I've tried some other fixes like preventing Windows from forcing signed device drivers and none of those seem to work either.
I know this isn't directly relevant to graphene but I'm certain many people have also encountered this. How can I fix?