Preheat: Set your air fryer to 400°F (200°C) and let it preheat for 5 minutes.
Prep Chicken: Place the 4 thin chicken cutlets on a cutting board. If they are uneven, use a meat tenderizer to gently pound them to the same thickness. Season both sides lightly with the kosher salt and black pepper.
Apply Mayo: Using a butter knife or silicone brush, spread a thin, even layer of mayonnaise over both sides of each chicken cutlet.
Mix Breading: In a wide, shallow dish, whisk together the Panko breadcrumbs, grated Parmesan cheese, garlic powder, and Italian seasoning.
Coat Chicken: Place each mayo-coated chicken breast into the breadcrumb mixture. Press firmly so the crumbs stick to the chicken, then flip and press the other side until fully coated.
Air Fry: Lightly mist your air fryer basket with olive oil spray. Place the breaded chicken in a single layer (cook in batches if necessary). Lightly spray the tops of the chicken with oil.
Cook & Flip: Air fry for 10-12 minutes. Crucial step: Flip the chicken halfway through the cooking time to ensure an even, golden-brown crust.
Serve: The chicken is done when the crust is deep golden and the internal temperature reaches 165°F (74°C). Serve immediately and enjoy!