Preheat your oven to 425°F and line a large baking sheet with parchment paper for easy cleanup.
Pat the chicken wings thoroughly dry with paper towels; removing moisture is the secret to achieving a crispy skin without deep-frying.
In a large mixing bowl, toss the wings with avocado oil, garlic powder, onion powder, sea salt, black pepper, and smoked paprika until evenly coated.
Arrange the wings in a single layer on the prepared baking sheet, ensuring they are not touching so the air can circulate.
Bake for 35 to 40 minutes, flipping the wings halfway through the cooking time, until they are golden brown and crispy.
While the wings bake, whisk together the sugar-free BBQ sauce and sriracha in a small bowl to create the spicy glaze.
Remove the wings from the oven and immediately toss them in a clean bowl with the spicy BBQ sauce mixture until well coated.
Serve the wings hot with the fresh celery sticks on the side for a refreshing and crunchy contrast.