Preheat your air fryer to 375°F and line a small section of the basket or a separate baking tray with parchment paper.
Place the chicken breast in a shallow bowl and pour the buttermilk over it, ensuring it is completely submerged to tenderize.
In a small plate, whisk together the almond flour, arrowroot powder, garlic powder, onion powder, sea salt, black pepper, and paprika.
Remove the chicken from the buttermilk and dredge it through the flour mixture, pressing firmly to create a thick, even coating.
Mist the coated chicken with avocado oil and air fry for 12-15 minutes, flipping halfway through, until the internal temperature reaches 165°F.
While the chicken cooks, prepare the biscuit by mixing the whole wheat flour and baking powder in a small bowl.
Use a fork to cut the cold grass-fed butter into the flour until it resembles coarse crumbs, then stir in the Greek yogurt until a dough forms.
Shape the dough into a round biscuit and place it in the air fryer for the last 8-10 minutes of the chicken's cooking time until golden and fluffy.
Serve the crispy chicken hot alongside the fresh biscuit.