Add chicken, peppers, onion, cumin, garlic, paprika, chili powder, salt, pepper, and olive oil to a large bowl and mix until chicken and peppers are coated.
Select the preset program of Preheat to preheat air fryer.
Place chicken and pepper mixture in the preheated air fryer.
Select the preset program of Chicken and set the timer to 15 to 20 minutes, then press Start/Stop.
Top each tortilla with chicken and pepper mixture, a dollop of sour cream, and sprinkle with cheese. Serve.
Tip: Add your favorite fajita toppings, such as shredded lettuce, sliced jalapeno, guacamole, salsa and serve with a lime wedge!