Actually re non-iPhone detection: I’ve been annoyed by air tags beeping and it’s definitely the case that the new anti-stalking features on AirTags make them rather noisy and easy to find as a result. You have to get very creative with the hiding spot so that thieves know it exists (they can hear it) but they can’t find it, remove it or take out the battery to disable it. I’ve heard stories about people planting more than one AirTag on their bike, such as dropping one in the frame in a hard to reach area, and having opportunists decide to drop the bike off at a used store than deal with the AirTag they can’t find that keeps making noise.