I wish they didn't do 24V PoE. I know they are coming from a WISP background, but a AP seems like something that should support 802.11af. It's not like it's something exotic.
Note that the Unifi AP AC Pro (which I'm using) are 802.3af/at (PoE/PoE+). The AC LR and AC Lite are indeed passive 24v. So there's that option within the line at least.