Great idea... But appears to be not practical.
I agree it's not practical in its current state.
The more important problem right now is signaling. Recovery is a much more flexible problem to solve.
there was some work on using apple's underlying BLE / mesh network they use for their tracking devices, but with open / alt devices
Something like that could be useful if anyone with an iphone going nearby the signal was enough to pick it up, without them requiring to have the app installed.
This is exactly the goal. It was a little difficult to do, so I just postponed it.
TLDR; Apple devices scanning in the background require a lot of workarounds [1].
Another comment suggested proposing this to Apple [2]. If this were built by Apple internally, it would be game-changing. A little delusion never hurt anyone :seenoevil:
[1]: http://www.davidgyoungtech.com/2020/05/07/hacking-the-overfl...