Hit SAUTE on the Instant Pot, and when it reads Hot, add your olive oil and ground beef, and start to crumble it up with a spatula
Add the sea salt, pepper, garlic powder and chili powder, and cook until beef is no longer pink
Stir in the onion and pepper, make sure there are no brown bits stuck to the bottom of the pot ( deglaze with a little beef broth if there is) then hit CANCEL to turn pot off
Pour macaroni over meat mixture, then add beef broth, diced tomatoes, tomato sauce and beans over macaroni. Do not stir
Place lid on pot, make sure vent is at sealing position, then hit PRESSURE COOK for 4 minutes
Pot will take a few minutes to reach pressure, then start cooking. When pot beeps, do a gradual quick release. When pin drops, remove lid, stir ingredients together, then stir in cheese, 1 cup at a time
Chili mac will start to thicken as it cools down