A:AnswerThere are apps that will alert samsung users of a near by unknown airtag. But it wont make a sound from the tag if that is what you are asking.
A:AnswerIf you still have an old device with the same apple id you connected the airtag to, you can remove the airtag and connect it to another new apple id. Another option is to share the airtag with another apple id from the main device.