Preheat air fryer to 350°. In a small bowl, combine chili sauce, lime juice, ketchup and soy sauce; reserve 1/2 cup for serving. In a large bowl, combine egg, bread crumbs, green onion, cilantro, salt, garlic powder and remaining 4 tablespoons chili sauce mixture. Add chicken; mix lightly but thoroughly. Shape into 12 balls.
In batches, arrange meatballs in a single layer in greased air-fryer basket. Cook until lightly browned, 4-5 minutes. Turn and cook until lightly browned and cooked through, 4-5 minutes longer. Serve with reserved sauce; sprinkle with additional cilantro.