Interesting that one way drug traffickers could avoid this problem is by having an iPhone, as it would let them know that an unidentified AirTag has been added on their person:
Discussion
there is a good open source app for Android as well that does this too
Oh cool. Sauce?
AirGuard - AirTag protection (Protect yourself from Apple's Find My Tracking)
https://f-droid.org/packages/de.seemoo.at_tracking_detection/