M1 machines can't currently run anything else than macOS natively. Linux support is being worked on (it actually boots and kind of runs, but it's still very experimental at the moment, not usable for any kind of work). And I don't think Microsoft is actually working on M1 support at all. Windows on Arm is still semi-useless even on their own devices.
Also, Apple seems to believe that virtualization is the way to go, not booting other OSes natively, so it's not disabled on Apple Silicon, but it isn't explicitly supported or well-documented either.