Place the chicken breast in a shallow bowl with the buttermilk and marinate for at least 30 minutes in the refrigerator.
In a separate shallow dish, whisk together the whole wheat flour, garlic powder, onion powder, smoked paprika, sea salt, and black pepper.
Remove the chicken from the buttermilk, allowing any excess to drip off, then dredge thoroughly in the seasoned flour mixture until fully coated.
Preheat your air fryer to 375°F and lightly coat the basket with half of the avocado oil.
Place the chicken in the basket and drizzle or spray the remaining avocado oil over the top to ensure a golden finish.
Air fry for 12 to 15 minutes, flipping halfway through, until the internal temperature reaches 165°F and the exterior is crispy.
While the chicken cooks, whisk the almond milk and arrowroot powder in a small saucepan over medium heat until it simmers and thickens into a velvety gravy.
Season the gravy with a pinch of salt and pepper, then pour it over the hot chicken and garnish with chopped fresh parsley.