Preheat your air fryer to 390°F (200°C).
Slice the chicken breast into thick strips or medallions to ensure even cooking.
In a small bowl, coat the chicken pieces thoroughly with the plain Greek yogurt, which acts as a clean 'buttermilk' binder.
In a separate shallow dish, whisk together the almond flour, arrowroot powder, garlic powder, onion powder, sea salt, and black pepper.
Dredge each piece of yogurt-coated chicken into the flour mixture, pressing firmly so the coating adheres to all sides.
Lightly mist the air fryer basket with avocado oil, place the chicken inside in a single layer, and spray the tops of the chicken with the remaining oil.
Air fry for 10-12 minutes, flipping halfway through, until the coating is golden brown and the internal temperature reaches 165°F.
While the chicken finishes, toast the whole-grain waffle until it is warm and slightly crisp.
Place the toasted waffle on a plate, top with the golden fried chicken, and finish with a drizzle of sugar-free maple syrup.