I have GeForce too but am unfamiliar with it. Came with the computer since a RTX GPU. I never play Logged-in to it. Just use Steam Log-in on the Client.

How does GeForce go about not letting a person use Mods? I use Mods on other games but never Logged-in on GeForce at the same time. So have never encountered this situation.

Very curious about it as it may affect other games I have!