Yes, I was using a bluetooth based tracker I found on Amazon, but the slightly clunky medallion ended up leading to issues with her being able to clean her own chest, and she got tangles under it. It can be a real issue.

So I've also been looking for a way to use an airtag unobtrusively. My cat isn't outdoors, but I have a big house and she's very old and likes to hide. I'm afraid someday she'll be sick or worse and I won't be able to find her, so something like this would make me feel a lot better.