find my works on one device but doesn't on another

My girlfriend and i share locations for years. I recently upgraded from an iphone 12 mini to a 15 pro. On my 15 pro the location didn't show up, so we canceled it and did it again. Now i can see it on my iphone 12 mini and my iPad but not on my new phone. I saw her email and says no location found. She can see my location tho.