yeah you can’t use the beta drivers here with the way Bazzite is built unfortunately. the issues you’re experiencing are all bugs related to Nvidia and Wayland, or some of the recent stuff with KDE X11 (which is no longer supported in upstream Fedora, but we’re keeping the package on -nvidia images until the new 555 drivers are released and stable.)
No yum either. rpm-ostree for system-level packages, read this guide:
https://universal-blue.discourse.group/docs?topic=35