Add the shredded cooked chicken to a medium mixing bowl. Sprinkle with taco seasoning and stir in the salsa. Mix until the chicken is evenly coated.
Warm the tortillas for a few seconds in the microwave between damp paper towels.
Place a tortilla on your work surface. Add a small amount of seasoned chicken, then top with a little more cheese. Fold the tortilla in half and press gently.
Preheat the air fryer to 375°F. Lightly spray both sides of each assembled taco with cooking spray. Arrange the tacos in a single layer in the air fryer basket.
Air fry the tacos at 375°F for 6 to 8 minutes, carefully flipping halfway through. Cook until the tortillas are golden and crisp and the cheese is completely melted.
Let the tacos cool for a minute or two before serving. Top with sour cream, salsa, guacamole, cilantro, jalapeños, lettuce, or a squeeze of lime.