Prep the wings: Pat the wings very dry with paper towels.
Moisture is the enemy of crispiness.
Mix the dry rub: In a bowl, combine salt, pepper, garlic powder, onion powder, smoked paprika, and baking powder (if using).
Coat the wings: Toss wings with avocado oil, then sprinkle on the dry rub. Mix until evenly coated.
Preheat the air fryer: Set to 380°F (193°C) for 3 to 5 minutes to ensure a hot start.
Arrange the wings: Place wings in the basket in a single layer, not touching. Work in batches if needed.
First cook: Air fry at 380°F for 18 minutes, shaking the basket or flipping halfway through.
Crisp finish: Increase to 400°F (204°C) and cook 4 to 6 more minutes, until deeply golden and the skin is crackly.
Internal temp should reach 165°F.
Make the sauce: In a small bowl, stir together buffalo sauce, melted ghee, and lemon juice or vinegar. Taste and adjust salt.
Toss and serve: Add hot wings to a large bowl, pour over the sauce, and toss to coat. Garnish with scallions or parsley if you like.