Spigen has quite a few, however our favorite is the Enzo Aramid case. This is an aramid fiber case so it is pretty thin, but it does have a magnet inside for MagSafe ... Pro Max (also the iPhone ...

Now, this will also work with non-iphones as well, phones like the OnePlus 13, Pixel 9 Pro and Galaxy S24 all support MagSafe with the correct case ... using on my iPhone 14 Pro for the past ...