I had an iPhone 7 up until last week and I had a steel plate in between the phone and case that then attached to a cygnett magnet in my car. Now I have the 12 mini and all I’ve done is bought a MagSafe charged and stuck one of the little magnetic pads that came with the cygnett magnetic car mount to the back of the mag safe, so now my MagSafe charger sticks to the magnetic mount and my phone then sticks to the MagSafe and charges. Hope this helps. See photos at attached