Nvidia drivers have included serious Wayland support since the 550 series. My NixOS Nvidia system has run equally as smooth as my Intel iGPU for close to a year now.
I have a GTX 650 Ti that keeps being erratic with Wayland to where it becomes unusable out of the box. Didn't take any time to try and resolve because it is being used as a server. Disabled the GUI service and only boot into terminal.
Like I said, you need 550-series drivers or later to have good support. The 600-series has been depreciated for a while now so its not surprising that it's not supported.
