Prepare Garlic Bread: Arrange frozen garlic bread slices in the air fryer basket.
Add Toppings: Spread a layer of pizza sauce over each slice. Sprinkle shredded mozzarella cheese on top and arrange sliced pepperoni.
Air Fry: Cook in the air fryer at 400°F (200°C) for 7-10 minutes, or until the cheese is melted and bubbly, and the bread is crispy.
Serve: Remove from the air fryer and let cool slightly before serving.