IIRC, when the Asahi project first started, Apple's response was they they didn't care about the project, and would make no efforts to hinder or help them. They also hinted that running an alternate OS was an acceptable use of device.
Man you randomly reminded me of when magic lantern was completely changing the game with their firmware side load on Canon DSLR’s. Then after a few years Canon decided “nah screw y’all” as they quietly pushed a firmware update that blocked it.
We will see if they continue that attitude.