Don't be curmudgeonly. Thoughtful criticism is fine, but please don't be rigidly or generically negative.
I think though, "write-only" third-party contributions are a necessary evolutionary step towards a more balanced ecosystem, so lack of an open reference could lead to the needed experimentation, both legal and technical
Apple doesn't support Asahi specifically but did build in the capability to boot another OS and intentionally does not block it.
One is cracking open a door (Apple) and the other is opening the door wide, and welcoming you into your home.
To play devil's advocate though, Darwin is technically open source?