Preheat your air fryer to 400°F and lightly spray the basket with avocado oil.
Place the chicken breast in a bowl with the buttermilk, coating every surface thoroughly to ensure the breading sticks.
In a separate shallow dish, whisk together the almond flour, 1 tbsp arrowroot, paprika, garlic powder, onion powder, sea salt, and black pepper.
Dredge the buttermilk-soaked chicken in the flour mixture, pressing firmly to ensure a thick, even coating on all sides.
Place the chicken in the air fryer basket and spray the top lightly with avocado oil; cook for 12-15 minutes, flipping halfway through, until golden and crispy.
While the chicken is cooking, whisk the chicken broth, coconut milk, and 0.5 tsp arrowroot powder in a small saucepan over medium heat.
Simmer the gravy for 3-4 minutes until it reaches a thickened, smooth consistency, then pour over the hot crispy chicken before serving.