https://wccftech.com/iphone-12-with-magsafe-could-cause-issues-with-pacemakers-suggests-a-medical-study/

It would be safe to say that the entire iPhone 12 lineup has more magnets than you might have kept with you in your drawer. Still, they serve a functionality that allows the phones to be wirelessly charged amongst other functionalities.

However, according to the latest report, a medical study that has been published by Hearth Rhythm Journal suggests that MagSafe might cause issues with some medical devices, namely pacemakers.