Preheat the air fryer to 400°F / 200°C for 3 minutes.
Mix panko, garlic powder, paprika, black pepper, and salt in one shallow dish, place flour in a second dish, and beaten egg in a third dish.
Dredge each chicken cutlet in flour, dip in egg, then press firmly into panko mixture to coat both sides.
Spray both sides of the breaded chicken lightly with cooking spray and arrange in a single layer in the air fryer basket without overlapping.
Air fry at 400°F / 200°C for 12 to 14 minutes, flipping halfway, until golden brown and the internal temperature reaches 165°F / 74°C.
Rest for 2 minutes before slicing or serving to keep the coating crisp and juices inside.