For aviation regulations there is no different between an active or passive tracker, the rules are not about takers. The rules are about there being a lithium

For aviation regulations there is no different between an active or passive tracker, the rules are not about takers. The rules are about there being a lithium battery in it (there is) and whether it has a radio transmitter (it does, airtags transmit Bluetooth signals). Lithium batteries are not allowed in checked baggage. Transmitters are allowed only if turned off.