It requires the iPhone to go "home" or "work" or any regular repeated location with the airtag following for some period of time.
That's why the dog airtag in the article continues to go off, when they take the dog on a walk, it follows the same path, then ends up back at the shared house. Their case would be solved by using an iCloud family plan, but they don't want to.
That's why the dog airtag in the article continues to go off, when they take the dog on a walk, it follows the same path, then ends up back at the shared house. Their case would be solved by using an iCloud family plan, but they don't want to.