Preheat your air fryer to 375°F (190°C).
Place the chicken breast in a small bowl with the buttermilk and let it marinate for at least 10 minutes.
In a separate shallow dish, combine the almond flour, cornmeal, smoked paprika, garlic powder, onion powder, sea salt, and black pepper.
Remove the chicken from the buttermilk, allowing excess to drip off, then dredge it in the flour mixture, pressing firmly to ensure an even, thick coating.
Place the chicken in the air fryer basket and lightly mist the top with avocado oil spray.
Air fry for 12-15 minutes, flipping halfway through and spraying the other side, until the internal temperature reaches 165°F and the crust is golden.
While the chicken cooks, stir together the whole wheat flour, Greek yogurt, and baking powder in a small bowl until a soft dough forms.
Shape the dough into a small round biscuit and place it in the air fryer next to the chicken for the last 8-10 minutes of cooking until puffed and lightly browned.
Serve the crispy chicken immediately alongside the warm biscuit.