I reheat pizza in my air fryer in a moderately involved way (but still low effort). Mine's got a reheat setting, which I set at 200 degrees for like 20 minutes just to get it to slightly above room temperature throughout. Then I hit air broil for maybe 1.5 minutes. It bubbles up the cheese and the oil in the crust without causing anything to char. Tastes pretty great, you just have to be willing to wait 25 minutes.