Place in air fryer basket in a single layer. You may need to cook in batches depending on the size of your air fryer.
Air fry at 380 °F for 12 minutes, stirring at the halfway point, or until chicken comes to temp (165 °F).
Sprinkle on mozzarella cheese. Either close the air fryer basket and let the cheese melt or bake for an additional 2-3 minutes depending on if you want melted or charred cheese.