Preheat air fryer to 400 degrees F (205 degrees C).
Into a mixing bowl, add Brown Sugar (1/4 cup), Onion Powder (2 teaspoon), Paprika (2 teaspoon), Ground Black Pepper (2 teaspoon), Kosher Salt (1 1/2 teaspoon), Garlic Powder (1 1/2 teaspoon), Crushed Red Pepper Flakes (1 1/2 teaspoon), and Celery Seeds (1 teaspoon). Stir to combine.
Rub the Pork Baby Back Ribs (1 slab) with the seasoning mixture.
Slice the ribs in half and place them in the basket of the air fryer. Cook for 20 minutes.
Flip the ribs and cook for an additional 20 minutes.
Slice up the rib rack into individual ribs. Slather in Barbecue Sauce (to taste). Cook for 3-5 minutes.
Serve warm with sides of choice.