
Preheat air fryer to 300°. Spread pesto on cut sides of both tops and bottoms of each roll. On each of the bottom halves, layer 3 ounces chicken and 1 slice cheese. On each of the top halves, layer 1/4 cup red pepper and 1 slice cheese.
Cook until heated through and cheese is melted, 4-6 minutes. Add spinach to bottom halves and replace tops.