I've had GeForce Now since the beginning when it had SO many titles (think Dishonored, Dishonored 2, etc.). A lot has been removed since its inception. It's not bad, but if you're really into gaming on your mac, Shadow Cloud Computing is the way to go. It isn't cheap, but if it's your thing and you love it, you can game COMPLETELY on your mac; it's pretty amazing. My build is around $47/mo. I know I could build/buy a PC for less over time, but I don't care. I can play via Shadow on my Studio, my M1 Max, whatever, wherever.
Access a Windows gaming PC from any device: Mac, old PC, smartphone, connected TV, tablet, etc.!
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