Preheat oven to 425°F and line a large baking sheet with parchment paper.
Pat the chicken wings completely dry with paper towels to ensure the skin becomes maximumly crispy.
In a large mixing bowl, toss the wings with avocado oil, sea salt, black pepper, garlic powder, onion powder, and smoked paprika until evenly coated.
Arrange the wings in a single layer on the prepared baking sheet, ensuring they are not touching to allow for proper air circulation.
Bake for 35 minutes, flipping the wings halfway through, until the skin is golden brown and very crisp.
While the wings bake, whisk together the sugar-free BBQ sauce, cayenne pepper, and apple cider vinegar in a small bowl.
Remove the wings from the oven and transfer them to a clean bowl, tossing with the spicy BBQ glaze until thoroughly coated.
Return the glazed wings to the baking sheet and bake for an additional 5 minutes until the sauce is tacky and slightly caramelized.
Serve the wings hot alongside fresh, crunchy celery stalks for a clean and satisfying meal.