Split the English muffins in half, creating 12 muffin halves.
Place the muffin halves, split side up, in the air fryer and cook for 2 to 3 minutes at 400°F.
Remove from the air fryer and top each muffin with pizza sauce, cheese, mini pepperoni, Italian seasoning, and garlic powder.
Note: After a minute, check to see if any pepperoni have fallen off. If so, simply place them back on.
Return the muffins to the air fryer and cook for an additional 3 to 4 minutes at 400°F. After 3 minutes, check and remove them once they reach your desired level of crispiness.
Note: Depending on the size of your air fryer, you may need to cook in smaller batches.