I honestly dont get why apple isn't more open with their drivers and stuff to get linux working on macbooks, they don't charge for macos, most of their profit comes from hardware it feels like opening up macbooks to be used by people that are linux diehards would just open up more sales
As other comments have mentioned, they have kind of a "total hands-off; neither help nor hinder" policy around 3rd-party operating systems on Apple Silicon. They aren't providing any kind of assistance, but they aren't doing anything to obstruct it either: even though the Linux drivers have to be reverse-engineered, the actual installation process is very easy and not inhibited at all by the extensive cryptographic boot chain protections built into macOS, even though it easily could be. And as far as I know, what little they have said publicly about this is that they don't intend to ever try and actively block Linux.
So in that sense I think it's mostly just a resources thing: they don't feel it's worth their time and money to assist this process. Which, honestly, I can't get that upset about: we're not entitled to Apple spending resources to help people install other operating systems on their hardware; so long as they don't actively impede the process I see no reason to get upset.
Most of their profits come from software or ecosystem lock ins. So while they do profit off of each Mac sold, if those sales don't translate to more iCloud subscriptions, app purchases, or iPhones then it really doesn't make financial sense for them. Even if they only had 3 people and a PM dedicated to Linux support, that's still roughly a million dollars a year for a nebulous promise of "slightly more hardware sales." It sucks but it's the reality of the situation.
