Preheat your air fryer to 375°F (190°C) and lightly coat the basket with the avocado oil spray.
In a small shallow bowl, whisk together the low-fat buttermilk, garlic powder, smoked paprika, sea salt, and black pepper.
Place the almond flour in a separate shallow dish.
Dip the chicken breast into the buttermilk mixture, ensuring it is fully submerged, then dredge it thoroughly in the almond flour until evenly coated.
In a medium mixing bowl, stir together the oat flour, non-fat Greek yogurt, and baking powder until a soft dough forms.
Using your hands, shape the dough into a thick round biscuit and place it in the air fryer basket next to the coated chicken.
Give the tops of the chicken and the biscuit one final light spray of avocado oil to ensure a crisp finish.
Air fry for 12-15 minutes, flipping the chicken halfway through, until the chicken reaches an internal temperature of 165°F and the biscuit is golden-brown and firm.