Slice the chicken breast into strips and soak in buttermilk for at least 15 minutes.
In a shallow bowl, whisk together almond flour, arrowroot powder, paprika, garlic powder, salt, and pepper.
Dredge the chicken strips in the flour mixture, pressing firmly to adhere, and spray lightly with avocado oil.
Air-fry the chicken at 400°F for 10-12 minutes, flipping halfway, until golden and cooked through.
While chicken cooks, whisk oat flour, egg white, almond milk, and baking powder until a smooth batter forms.
Pour batter into a preheated, lightly greased waffle iron and cook until crisp and steam stops rising.
Place the crispy chicken atop the warm waffle and drizzle with sugar-free maple syrup.