Preheat the air fryer to 375°F.
In a bowl, toss chicken pieces with cornstarch, salt, and black pepper.
Lightly coat the air fryer basket with olive oil and arrange chicken pieces in a single layer.
Air fry for 12-15 minutes, shaking halfway through, until golden and crispy.
Meanwhile, in a saucepan, combine orange juice, soy sauce, honey, rice vinegar, ginger, and garlic. Bring to a simmer.
Stir in the cornstarch slurry and cook until thickened.
Toss the crispy chicken with the orange sauce until well coated.
Garnish with sesame seeds and chopped green onions. Serve immediately.