After a whole kerfuffle after switching motherboard and CPU (and still not being able to set EFI as default boot), nvidia no longer loads any gui. I have TTY access thankfully. nvidia and nvidia-dkms provide similar results. modprobe nvidia complains that the module has not been found.
modprobe nouveau does indeed load up SDDM correctly along with everything else, but ideally I want to be running specialised drivers for my GPU as I was before.
Kernel: 6.3.3-zen1-1-zen
GPU: GTX 1660 SUPER
CPU: Ryzen 5 5600
Motherboard: MSi MPG B550 Gaming Plus