Pat the chicken dry and pound to an even thickness.
In a small bowl, combine the salt, garlic powder, paprika, pepper, and cayenne pepper.
Sprinkle the seasoning mixture over the chicken. If desired, you can let the chicken sit in the refrigerator overnight.
Preheat your air fryer to 400° F.
Brush both sides of the chicken with avocado oil.
Place the chicken in the air fryer basket and cook for 7 minutes.
Flip, and cook for another 7 to 8 minutes, or until the internal temperature registers 155° F.
Brush the chicken well with about ½ of the BBQ sauce.
Return the chicken to the air fryer and cook for another 2 to 3 minutes, until the internal temperature registers 160° F
Allow the chicken to rest for 5 minutes before serving.
Serve with the remaining BBQ sauce.