I don’t viable these are viable for tracking since these are linked to your iCloud. I’m willing to bet that with a. Warrant Law enforcement can ask Apple to identify a specific airtag.
Knowing whose airtag it is isn’t all that helpful in domestic abuse cases. My partner is a domestic abuse survivor, if there were an airtag found on her items we’d know exactly whose it is, but we’d still be scared for both of our lives, probably need to permanently vacate our living area, and the police wouldn’t be all too helpful. (Restraining order already in place, not much help when the opposing party is insane)