Are they really “doing everything they can to prevent it”? The Asahi folks have already talked about how some of the things in the boot loader only make sense to allow non-Apple OSes. On top of the fact that the boot loader itself is unlocked when we know for a fact they know how to lock down a boot loader for their own chips since they do it for iPhones and iPads.

It seems to me like they are indeed just “not supporting” it, to the fullest extent possible.

this is literally the status quo. have you looked at Asahi Linux?