Hi, Look fro my post here, this is how I do NVIDIA installation under Fedora KDE and it works for me:
I have a desktop with an RTX4080 and a 13th gen i9, so kinda close to your setup.
However, my NVIDIA drivers broke several times already, on two PCs, in a manner you described, but it happened AFTER a system upgrade and a new kernel. Then I had to simply repeat the process to install the drivers again and they worked again.
If you search the forum, there are more post like this.
NVIDIA GPU under Linux is a giant PITA though. No matter the distro, you will have problems like this from time to time.