We got an Instant Pot for Christmas then my wife asked me about an Air Fryer so I got her one. To tell the truth,I've cooked 7-8 meals in both of them so far and she just did her second today (Ham & Bean Soup).
I recommend you you go to YouTube for instructions, recipes and general info on either system.
I did Spare Ribs in the Instant Pot last week when the temp was -22F with -55F windchill. I cut it into 4 sections, rubbed them and used 1 C Apple Juice versus water. I think it was at 360 for 25 mins and they were falling apart when I picked it up. I sauced the bone side and put it under the broiler for 4 mins, flipped, sauced and anther 4 mins on the meat side. Even though they weren't smokey, they did taste good.
I've done mostly chicken and fries in the Air Fryer. It's OK, but I know it will come in handy in the Summer while I'm smoking meat outside. LOL!