I think you would need to install them from the AUR using yay.
yay -S nvidia-390xx-dkms
After check if the Nvidia drivers are loaded with
inxi -Ga
Then you could also install
nvidia-390xx-settings
nvidia-390xx-utils
Edit: I also notice it is a hybrid laptop currently rendering on Intel. So you would also need a way of switching to nvidia depending on your hardware.
API: OpenGL v: 4.6 Mesa 23.1.3 renderer: Mesa Intel HD Graphics 5500 (BDW
GT2) direct-render: Yes
Edit: It’s probably easier to do it this way all at once.
yay -S lib32-nvidia-390xx-utils nvidia-390xx-dkms nvidia-390xx-settings nvidia-390xx-utils