An air fryer is actually one of the best ways to make steak if you don't follow the prescribed recipe in the link, but if you reverse sear (a reliable and well-known technique, usually done with an oven, which an air fryer is).

If your steak is about 1.5" thick, you can airfry at 260ºF for 18 minutes, flip once. This raises the internal temperature uniformly to around 130ºF.

Then sear 1 minute per side and 30 secs on the sides, to get a crust. That's it.

(no resting needed because it's a reverse sear, the internal temperature is already where it's supposed to be for medium rare).

Tip: remember to pre-heat your air fryer per the instructions in the manual. A 260ºF pre-heat should only take 2 minutes.