Apple could also support open standards like UEFI/dt/acpi. Asahi uses lots of workarounds (including pretending to be MacOS) to be even able to boot the linux kernel. This would projects such as Asahi a lot easier and more reliable.
And I'm not even talking about drivers
> Asahi uses lots of workarounds (including pretending to be MacOS) to be even able to boot the linux kernel.
In the x86 sphere it isn't that much better either, most ACPI tables are thoroughly broken if Linux announces itself as Linux and not as Windows. In fact, a lot of machines' ACPI tables barely work on Windows.
UEFI or its predecessor ACPI are complicated and support a long list of legacy stuff that has absolutely no value to Apple at all so why should they do the development? It's like asking Tesla for a fuel tank so it would be easier to install a gasoline engine.