Apple has released an AirTag tracking device for Android, but you can't actually use it to track AirTags.
Apple AirTag Firmware Updates Adds Feature to Address Stalking Concerns, Fixes Accelerometer Bug: Report
Does AirTag Work With Android?
Android's new 'unknown tracker alerts' can help warn users of rogue Apple AirTags
Two Women Sue Apple Over AirTag Stalking - The New York Times
Android Phones Can Now Detect Rogue AirTags, No App Download Required
Is Your Android Being Tracked by an AirTag? Here's How to Find Out - CNET
My Android told me a mysterious AirTag was following me, but that's not what has me worried
Did you know you can use Apple AirTag with your Android phone?
Newest Android Feature Alerts Users About Unwanted AirTag Tracking - CNET