Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper or a wire rack for maximum airflow.
Pat the chicken wings thoroughly dry with paper towels; removing moisture is the secret to getting that skin perfectly crispy in the oven.
In a large bowl, toss the wings with avocado oil, sea salt, black pepper, garlic powder, smoked paprika, and cayenne pepper until evenly coated.
Arrange the wings in a single layer on the prepared baking sheet, ensuring they are not touching.
Bake for 35 to 40 minutes, flipping the wings halfway through, until the skin is golden brown and crispy.
While the wings bake, whisk together the nonfat Greek yogurt and lime juice in a small ramekin to create a cooling dipping sauce.
Slice the celery stalks into 3-inch sticks.
Once the wings are finished, transfer them to a clean bowl and toss with the sugar-free BBQ sauce until every wing is glazed.
Serve the hot wings immediately alongside the celery sticks and the zesty yogurt dip.