First, we need to know which instructions were used to install the nvidia drivers. That tutorial you linked is more than 2 years old, related to fedora 33 & 34, and also includes installing from nvidia.com.
We can get a very quick answer if you were to provide the results from
dnf list installed \*nvidia\* since that also shows the repo the packages came from.
The info from steam is not pertinent to getting the driver working properly.
Please show lsmod | grep nvidia and inxi -Fzxx
The steam issue may be related to using wayland and not using xorg.