Preheat the air fryer to 400°F / 200°C for 3 minutes.
Mix panko, Parmesan, Italian seasoning, and garlic powder in a shallow dish, then dip each cutlet in beaten egg and press into the breadcrumb mixture to coat both sides.
Spray both sides of the breaded cutlets lightly with olive oil spray and place in a single layer in the air fryer basket.
Air fry for 10 minutes, flipping halfway, until the coating is golden and the chicken reaches 165°F / 74°C at the thickest part.
Spoon marinara sauce over each cutlet, top with shredded mozzarella, and air fry for 2 more minutes until the cheese melts.
Serve immediately over pasta or on a toasted roll for a sandwich.