Preheat the air fryer to 400°F (200°C). Cut the chicken into bite-sized pieces.
Whisk the eggs in one bowl. In another bowl combine the cornstarch, flour, garlic powder, onion powder, salt, and black pepper.
Dip each chicken piece into the egg, then coat evenly in the flour mixture.
Arrange the coated chicken in a single layer inside the air fryer basket. Lightly spray with cooking oil.
Air fry for 10–12 minutes, flipping halfway through, until golden brown and cooked through.
While the chicken cooks, combine the soy sauce, honey, brown sugar, rice vinegar, sesame oil, garlic, and ginger in a saucepan over medium heat.
Mix the cornstarch and water together, then stir into the sauce. Simmer for 2–3 minutes until thickened.
Transfer the cooked chicken to a large bowl and pour the sesame sauce over it. Toss until evenly coated.
Garnish with sesame seeds and sliced spring onions. Serve immediately with steamed rice or vegetables.