Nvidia drivers are not loaded, despite apparently being successfully installed?
For instance check:
sudo modinfo nvidia_drm
Do you have secureboot enabled?
sudo mokutil --sb-state
If secureboot is enabled, did you see a blue screen on first reboot and did you enroll the new keys?
sudo mokutil --list-new
Does modprobe nvidia (as superuser) spit any errors?
The boot command line already has rd.driver.blacklist=nouveauwhich is equivalent.
But adding nvidia-drm.modeset=1 might help.