I didn’t looking it that much, but while “continue as guest” is a prominent option in Razer Synapse, I was unable to get GeForce Experience to let me install updates without signing in.
It’s whatever though, you can install and update to relatively recent Nvidia drivers with the CUDA winget package. Now that I think about it, around 95% of my Windows software is installed through winget these days. I’m a big fan.