Toss chicken pieces in cornstarch until fully coated, then dip each piece into beaten eggs, and back into cornstarch for a second coat.
Preheat the air fryer to 400°F (200°C). Arrange the chicken in a single layer in the basket, making sure pieces don't overlap. Spray generously with cooking spray.
Air fry for 12 to 14 minutes, shaking the basket halfway through, until the chicken is golden and crispy on all sides.
While the chicken cooks, combine orange juice, soy sauce, rice vinegar, brown sugar, honey, sesame oil, garlic, and ginger in a small saucepan over medium heat. Bring to a simmer.
Stir in the cornstarch slurry and cook for 1 to 2 minutes until the sauce thickens and becomes glossy.
Transfer the crispy chicken to a large bowl, pour the orange sauce over it, and toss until every piece is evenly coated. Garnish with sesame seeds and green onions and serve over rice.