Preheat your air fryer to 360°F, which usually takes about 5 minutes. If your air fryer tends to stick, give the basket a quick spray with nonstick cooking spray.
Spread a thin layer of pizza sauce on each bagel half, then sprinkle shredded mozzarella cheese on top. Add mini pepperoni slices and a dash of Italian seasoning for extra flavor.
Place the prepared bagel halves in a single layer in the air fryer basket, ensuring they are not touching for even cooking.
Air fry the bagel bites at 360°F for 4-6 minutes. Keep an eye on them after 4 minutes to prevent overcooking. Each air fryer is different, so adjust the time as needed.