Hell, if you had gone from an arch derived distro like EndeavourOS and just clicked the nvidia option. It would have been solved.

I recently installed it on a one plus 6t (about a month ago) cause that seemed to be what a lot of videos were using and I read it had great compatibility. Never ran into any issues with the hardware buttons not functioning since that is a big part of tampering with mobile devices.

You aren’t meant to use them for managing your system. They are mainly there for development. For example, I often use them for a debian chroot on arch.