PITAKA PinButton MagEZ Case Pro 4 for the Galaxy S24 Ultra.
It has three remappable NFC buttons that you can press to do one action per button.
I use Samsung's Modes and Routines to map each button, and it works really well!
It is also compatible with MagSafe chargers. 2nd
pic.twitter.com/VJMK4nOlEe