Start by trimming the chicken breasts to remove any excess fat. Use a meat mallet or rolling pin to gently pound the chicken to an even thickness of about 1/2 inch.
In a bowl, combine the Italian dressing, kosher salt, and garlic powder. Add the chicken cutlets and toss to coat. Let them marinate for at least 30 minutes.
In one shallow bowl, place the beaten egg. In another shallow bowl, combine the seasoned whole wheat breadcrumbs, grated cheese, and dry Italian seasoning. Mix well to combine.
Remove the chicken from the marinade, dip each cutlet first into the beaten egg, and then into the breadcrumb mixture. Press the breadcrumbs onto the chicken.
Preheat your air fryer to 400°F (200°C) for about 5 minutes.
Spray the air fryer basket with olive oil spray, place the breaded chicken cutlets in a single layer, and lightly spray the tops of the cutlets.
Air fry the chicken cutlets for about 10-12 minutes, flipping halfway through. Check that the internal temperature has reached 165°F (74°C).
Once cooked, remove the chicken cutlets from the air fryer and let them rest for a few minutes before serving.