Preheat your oven to 425°F and line a large baking sheet with parchment paper for easy cleanup.
Pat the chicken wings completely dry with paper towels to remove excess moisture for a crispier skin.
In a large mixing bowl, toss the wings with avocado oil, sea salt, black pepper, garlic powder, smoked paprika, onion powder, and cayenne pepper until every wing is thoroughly coated.
Arrange the wings in a single layer on the prepared baking sheet, making sure they are not touching to allow for proper airflow.
Bake for 30 to 35 minutes, flipping the wings halfway through the cooking time, until they are golden brown and the skin is crispy.
Transfer the baked wings to a clean bowl and toss them with the sugar-free BBQ sauce until well glazed.
Return the wings to the baking sheet and broil for 1 to 2 minutes until the sauce is bubbly and slightly caramelized.
Serve the wings hot alongside the celery stalks and a quick dip made by mixing the Greek yogurt with chopped fresh chives.