There are apps for Android that monitor and alert for nearby AirTags.

There's an official one by Apple, Tracker Detect [1], but I've heard that some third-party apps perform better [2].

I have no personal experience with any of them.

1: https://play.google.com/store/apps/details?id=com.apple.trac...

2. https://mashtips.com/android-airtag-finder-apps/