Preheat your air fryer to 375 degrees F.
In a small bowl, combine the whole wheat pastry flour, baking powder, and Greek yogurt, stirring until a soft dough forms.
Shape the dough into a round biscuit and place it in the air fryer basket to cook for 8-10 minutes until golden and firm.
While the biscuit is baking, dip the chicken breast into the buttermilk, ensuring it is fully coated.
In a shallow dish, mix the whole wheat flour with garlic powder, paprika, sea salt, and black pepper.
Dredge the buttermilk-soaked chicken in the flour mixture until evenly coated, then lightly spray or brush with avocado oil.
Once the biscuit is done, remove it and place the chicken in the air fryer.
Cook the chicken at 375 degrees F for 12-15 minutes, flipping halfway through, until the coating is crispy and the internal temperature reaches 165 degrees F.
Serve the crispy chicken immediately alongside the warm, fluffy biscuit.