Place the chicken breast in a shallow bowl and pour the buttermilk over it, letting it marinate for at least 15 minutes to tenderize.
In a separate shallow dish, whisk together the almond flour, arrowroot starch, garlic powder, onion powder, sea salt, and black pepper.
Remove the chicken from the buttermilk, allowing excess to drip off, then dredge thoroughly in the flour mixture until evenly coated.
Preheat your air fryer to 400°F and lightly spray the basket with half of the avocado oil.
Place the chicken in the air fryer and spray the top with the remaining avocado oil; cook for 12-15 minutes, flipping halfway, until the crust is golden and the internal temperature reaches 165°F.
While the chicken cooks, toast the whole grain waffle until it is warm and slightly firm.
Place the toasted waffle on a plate, top with the crispy chicken breast, and finish with a drizzle of pure maple syrup.