Preheat the air fryer to 400°F and lightly spray the basket with nonstick cooking spray.
Set up three shallow bowls: bowl 1 - combine the all-purpose flour, cornstarch, smoked paprika, garlic powder, and salt; whisk to blend.
Place the beaten eggs in bowl 2.
Place the panko breadcrumbs in bowl 3.
Working with one piece at a time, dredge each chicken piece in the flour mixture, shake off excess, dip into the beaten eggs, then coat thoroughly with panko.
Arrange coated chicken pieces in a single layer in the air fryer basket without touching; cook in batches if necessary.
Air fry for 8–10 minutes, flipping once halfway through, until the chicken reaches an internal temperature of 165°F and is crispy.
Transfer the cooked chicken to a large bowl, pour the buffalo sauce over it, and gently toss to coat evenly.
Optional: return the coated chicken to the air fryer and cook 3–4 additional minutes for extra crispiness.
Serve immediately with your favorite dipping sauce if desired.