Maybe MacOS isn't a good push for gaming for either developers or Apple. I definitely think iOS is. The Apple Arcade Subscription plan seems to be part of that for gaming. I've seen a lot of people on the subway and even at work sometimes playing mobile games on their iOS device, from Call of Duty Mobile to racing games to tower defense.
I imagine when Apple expands their desktop and laptop lineup to M1 chips, it's going to include many of the games that are available from their mobile catalog.