Preheat your air fryer to 400°F and lightly spray the basket with avocado oil.
Peel and cube the sweet potato, then place in the air fryer for 15-18 minutes until tender and browned.
While potatoes roast, place the chicken breast in a bowl with the buttermilk and let soak for 10 minutes.
In a separate shallow dish, whisk together the almond flour, arrowroot powder, smoked paprika, garlic powder, onion powder, sea salt, and black pepper.
Remove the chicken from the buttermilk, letting excess drip off, then dredge thoroughly in the flour mixture, pressing to ensure a thick coating.
Remove the sweet potatoes from the air fryer and set aside; lower the temperature to 375°F.
Place the coated chicken in the air fryer, mist the top with avocado oil, and cook for 12-15 minutes, flipping halfway through, until the internal temperature reaches 165°F.
While the chicken finishes, steam the green beans for 4-5 minutes until they are vibrant green and tender-crisp.
Serve the crispy chicken immediately alongside the roasted sweet potatoes and steamed green beans.