In a medium bowl, combine the Parmesan cheese, white vinegar, olive oil, lemon juice, garlic powder, oregano, onion powder, crushed red pepper flakes, salt, and pepper.
Mix until well combined.
Pound the chicken breasts to an even thickness using a meat mallet or rolling pin.
Coat each chicken breast thoroughly in the Parmesan mixture, covering both sides evenly.
Lightly spray the air fryer basket with non-stick cooking spray.
Arrange the chicken in a single layer without overlapping.
Cook the Air Fryer Garlic Parmesan Chicken at 375°F (190°C) for 12 minutes, flipping halfway through if desired for even browning.
Ensure the internal temperature reaches 165°F (74°C).
Let the chicken rest for 2–3 minutes before serving.