Man, if it was that simple, ALARM wouldn’t exist and arch would have (at least) allowed aarch64 packages in the AUR years ago.

Arch's policy is to offer only x64 binaries. They don't offer ARM packages because they don't want to. ALARM exists because Arch does not want the contributions.

While it's not zero work, your claim of reinventing the wheel overstates what compiling software that's already compatible with ARM requires.

I'm reading what Collabora wrote and nowhere is that blog post did they state that compiling stuff for ARM and the packaging are the hard parts. They explicitly called out the reproducibility parts, not the rest.

If your small community project with dead forums and broken logs (see below) can do it, a team of full time Linux engineers can do it in a relatively small amount of time, probably with logs.