Preheat your air fryer to 400°F (200°C) to ensure a hot environment for maximum crisping.
Pat the chicken wings extremely dry with paper towels; removing moisture is the secret to getting that crackling skin without deep frying.
In a large mixing bowl, whisk together the baking powder, smoked paprika, garlic powder, onion powder, sea salt, and black pepper.
Drizzle the wings with avocado oil and toss to coat, then sprinkle the spice mixture over the wings and toss again until every wing is evenly coated.
Place the wings in the air fryer basket in a single layer, making sure they are not touching so the air can circulate freely.
Air fry for 18-22 minutes, flipping the wings halfway through, until the skin is golden brown and very crispy.
Transfer the hot wings to a clean bowl, pour over the sugar-free BBQ sauce, and toss gently until the wings are glazed and glistening.