Slice the chicken breast into even strips and place them in a bowl with the buttermilk to marinate for 15 minutes.
In a shallow dish, whisk together 2 tablespoons of arrowroot powder, almond flour, garlic powder, onion powder, paprika, sea salt, and black pepper.
Remove each chicken strip from the buttermilk and dredge thoroughly in the flour mixture until fully coated.
Lightly coat the air fryer basket with half of the avocado oil and place the chicken inside in a single layer, spraying the tops with the remaining oil.
Air fry at 400°F for 12-15 minutes, flipping halfway through until the coating is golden and the chicken is cooked through.
While the chicken cooks, whisk together the chicken bone broth, almond milk, and 1 teaspoon of arrowroot powder in a small saucepan over medium heat.
Simmer the gravy for 3-5 minutes, whisking constantly until it reaches a velvety consistency.
Plate the crispy chicken strips and drizzle the warm gravy over the top before serving.