Slice the chicken breast into even strips and place them in a bowl with 2 tablespoons of the Greek yogurt, garlic powder, onion powder, smoked paprika, sea salt, and black pepper.
Dredge each marinated chicken strip in the almond flour until evenly coated, pressing firmly so the crust adheres.
Lightly coat the chicken with avocado oil and place in an air fryer at 375 degrees Fahrenheit for 12 to 15 minutes, flipping halfway through until the exterior is golden and crunchy.
In a separate bowl, whisk together the oat flour, egg white, and the remaining 2 tablespoons of Greek yogurt until a smooth batter forms, adding a teaspoon of water if needed to reach a pourable consistency.
Pour the batter into a preheated, lightly greased waffle iron and cook until the steam stops and the waffle is firm and slightly toasted.
Place the hot waffle on a plate, top with the crispy chicken strips, and finish with a drizzle of maple syrup.