Comment by arghwhat

Nothing related to the attachment point.

I don't know of any third-party AirTag-compatible trackers that have UWB right now, but this applies equally to tags that are much larger than the AirTag. The rest is identical - good battery life, range, loud speaker, ...

I have a few theories on the lacking UWB:

1. Given that UWB is also super slow to roll out to Google Find, with only the Moto Tag available, there might be a technical/regulatory hurdle that manufacturers don't think is worth it

2. Apple/Google might make it a pain to be allowed to integrate with their UWB stuff

3. Cost - maybe the UWB stack is comparatively expensive, with third-party tags aiming for price brackets as low as 1/0th the cost of an AirTag

As a note, I don't know if this is because of regional differences in spectrum limits, but at least with AirTag and Moto Tag v1 EU versions, I could never get UWB to give any meaningful directions until I was already staring at the thing. Once you were in range to even consider UWB, playing a sound would be way more effective.