Preheat the air fryer. Set it to 400°F (200°C) for 5 minutes. Lightly spray the basket with nonstick cooking spray to prevent sticking.
Mix the rub. In a small bowl, combine salt, pepper, smoked paprika, garlic powder, onion powder, brown sugar, and cayenne if using.
Season the chops. Pat the pork chops dry again if needed. Rub both sides with olive oil, then coat evenly with the spice mix. Press the seasoning in so it adheres well.
First cook. Arrange the pork chops in a single layer in the air fryer basket. Do not overlap. Air fry at 400°F for 6 minutes.
Sauce and flip. Brush the tops with BBQ sauce, flip, and brush the other side. Air fry for another 5–7 minutes, depending on thickness, until the internal temperature reaches 145°F (63°C).
Rest and glaze. Transfer the chops to a plate and rest for 5 minutes. Brush with a little more BBQ sauce for a glossy finish.
Serve. Sprinkle with chopped parsley or chives if you like, and pair with coleslaw, corn, or a simple green salad.