Slice the chicken breast into even strips and place them in a shallow bowl with the buttermilk to marinate for at least 15 minutes.
In a separate small bowl, whisk together the almond flour, garlic powder, onion powder, sea salt, and black pepper.
Remove each chicken strip from the buttermilk, letting any excess drip off, and dredge thoroughly in the almond flour mixture.
Lightly coat the air fryer basket with avocado oil, place the chicken inside, and spray the tops of the chicken with the remaining oil.
Air fry at 375°F for 12-15 minutes, flipping halfway through, until the coating is golden brown and the chicken is cooked through.
While the chicken cooks, steam the green beans until crisp-tender and warm the whole wheat biscuit in the oven or toaster.
Serve the crispy chicken alongside the warm biscuit and steamed green beans.