Thanks. That is exactly what I am doing. Meanwhile my wife's XS can read the AirTag but not the iPhone 8 Plusif you're trying to identify a found tag, you must get it really close to your phone.
Best results are holding the tag against ( touching) the top center edge of the back of the phone (kinda next to the camera) For phones with a notch, hold it against the back, right behind the notch.