Preheat the air fryer to 325 degrees F (163 degrees C).
In a mixing bowl, stir together the cream cheese, cheddar cheese, black pepper, and garlic powder.
Fill each jalapeño halve with about 1 tablespoon of the cream cheese mixture.
Wrap a slice of bacon tightly around each jalapeño half and secure horizontally with a toothpick. Repeat with all the peppers.
Place jalapeño poppers in the air fryer and cook for 10-14 minutes, until the bacon is cooked through and crisp to your liking.
