Well AOSP doesn't run on a single phone on earth (not even the emulator) so you also have to take into account the reality of what Android is on the ground.

AOSP doesn't even include a functional keyboard nor a proper call manager nowadays

▲

Gander5739 4 hours ago | parent [-]

But lineageos, grapheneos etc. are based on AOSP and do run on actual phones.

	▲	realusername an hour ago \| parent [-]
		They had to put so much work to make it run on actual phones that each project is kind of it's own thing.