Cube the chicken breasts into bite-sized pieces and set aside.
In separate bowls, place flour and panko breadcrumbs. Season each with salt, garlic powder, and pepper.
Whisk eggs in a third bowl.
Coat chicken pieces in flour, then egg, then breadcrumbs.
Arrange chicken in a single layer in the air fryer basket and lightly spray with oil.
Cook at 200°C (400°F) for 15 minutes, flipping halfway, until golden and crispy.
Meanwhile, prepare the Honey Garlic Air Fryer Chicken Bites sauce by combining sesame oil, garlic, honey, soy sauce, sweet chili sauce, and cornstarch mixed with water in a saucepan.
Simmer until slightly thickened, then season with salt and lemon juice.
Toss the cooked chicken in the sauce until well coated.
Serve immediately with sesame seeds and chopped green onions if desired.