01 - Preheat oven to 400°F or air fryer to 375°F. Line baking sheet with parchment paper or spray air fryer basket with nonstick spray.
02 - Toss chicken pieces with salt, black pepper, and garlic powder in a bowl until evenly coated.
03 - Combine almond flour and parmesan cheese in a shallow dish, mixing thoroughly.
04 - Dredge each chicken piece in the flour mixture, pressing lightly to adhere coating to all sides.
05 - Place coated chicken pieces on prepared baking sheet in single layer or in air fryer basket without overcrowding.
06 - Bake for 15-18 minutes or air fry for 12-15 minutes, turning halfway through, until golden brown and internal temperature reaches 165°F.
07 - While chicken cooks, whisk mayonnaise, sriracha, rice vinegar, sweetener, and sesame oil in bowl until smooth and fully incorporated.
08 - Transfer cooked chicken immediately to bowl with sauce. Toss gently until all pieces are evenly coated.
09 - Transfer to serving platter. Sprinkle with chopped scallions and sesame seeds. Serve immediately while hot.