>>105912390
Can't you just run it inside a chromium web browser? From my experience it was fine.
I guess they might limit the maximum display size and framerate in a web browser? I think it was running 1080p@60Hz for me back when I used it. But I was also using the free version which probably has limitations.

And to answer your question, yes. They officially brought it to SteamOS. And it's literally just a flatpak which you can apparently install almost anywhere (was confirmed to work in Bazzite)
flatpak remote-add --user --if-not-exists GeForceNOW https://international.download.nvidia.com/GFNLinux/flatpak/geforcenow.flatpakrepo
flatpak install -y --user GeForceNOW com.nvidia.geforcenow