Lots! On my base model Mac Mini ($700, M1, 8GB RAM, 256GB SSD) I've played League of Legends, Factorio, Stelaris, Civilization 6. All of them have native offerings for macOS, and the experience isn't too different from Windows.

It's not a great choice for gamers, but for people that only play games casually/occasionally it's a surprisingly good choice.

I myself played Ratchet & Clank 3 on PCSX2 on my Macbook Air M1.

I enjoyed playing Stellaris on my MacBook M1 pro on a transcontinental flight last night. 4x games work well for passing the time!

Minecraft with shaders and a high-res resource pack.

There's always MUDs!