Connected devices under “FindMy”
Is there a way to find out who is using the unknown device that’s connected to my Apple ID?
iPhone 13, iOS 15
Question marked as
No, there isn't a way to track the person.
You can remove the device using the steps in the article below. As a precaution, change your password.
Apple ID device list -Check to see where you‘re signed in. *
ASC YouTube for How to reset your Apple ID password
What to do after you change your Apple ID or password - Apple Support - I suggest doing this before you change your Apple ID or password.