Preheat your air fryer to 400°F and dice the sweet potato into half-inch cubes.
Toss the sweet potato cubes with half of the avocado oil and a pinch of sea salt, then place in the air fryer basket for 15 minutes.
Slice the chicken breast into even strips and submerge them in a bowl with the buttermilk to marinate for 10 minutes.
In a shallow dish, whisk together the whole wheat flour, panko breadcrumbs, garlic powder, smoked paprika, sea salt, and black pepper.
Remove chicken from the buttermilk, dredge each piece in the flour mixture until fully coated, and lightly mist with the remaining avocado oil.
Add the coated chicken to the air fryer alongside the sweet potatoes and cook for 10-12 minutes, flipping halfway through until the coating is golden and crispy.
While the chicken finishes, steam the green beans for 4-5 minutes until they are tender-crisp and vibrant green.
Plate the crispy chicken with the roasted sweet potatoes and steamed green beans for a balanced, clean-eating meal.