The hardware is great for developing games, but the software experience is so cumbersome that it makes sense why game devs don't port to Apple Silicon:

- You need to port to ARM (not that bad, but now you're debugging two versions and increasing your dependency graph)

- You need to distribute on MacOS/iPad (not insurmountable, but kowtowing to Apple's ever-changing demands is a different game than jumping through Sony/Nintendo's hoops)

- You need to port to Metal (pretty hard, requires Mac-specific developers and a separate dev branch)

Of course, there are still devs who spend the extra time to make Mac-native games (Factorio and Rimworld), but compared to targeting Linux/Windows the effort doesn't make sense. For Apple to make their platform an attractive gaming platform, they can either a. Allow sideloading < or > b. Welcome third-party graphics APIs to Apple Silicon. Unless they sweeten the deal though, I doubt we'll see many AAA ports in the future.