Just going to point out that these are going to be abused in all sorts of ways, just like AirTags are.
Tempted to see if there's a way to make a generic BT tag sensor I can build into a hammer. That way, if the sensor pings, I'll already have a hammer handy.
https://bgr.com/tech/12-things-about-find-my-device-on-android-that-you-need-to-know/