Maybe you could try to remove the video-hybrid-intel-nvidia-prime driver from MHWD, and try to reinstall it, or install the 470 driver instead.
If inxi still doesn’t show Nvidia driver loaded for your Nvidia card, make sure you don’t have blacklist somewhere forbidding loading the Nvidia module (optimus manager or bumblebee might do that, you said you don’t have it but that doesn’t mean you didn’t install it at some point).
For additional info give output of ls /usr/lib/modprobe.d/ and ls /etc/modprobe.d/