First, pat the chicken breast dry. You should be using seasoned breadcrumbs but you can add a light coating of salt and pepper if you'd like.
Set up an egg wash station and a breading station on the counter. Dip the chicken in the egg wash then cover with the breadcrumbs. Important step, set the breaded chicken on a plate or cutting board for about 5 minutes. This will allow the breadcrumbs to really stick to the chicken and absorb some of the egg.
Preheat the air fryer to 360℉.
Once preheated place the chicken in the air fryer then set the time for 12 minutes. At the 6 minute mark, flip the chicken then add two spoonfuls of marinara sauce then add the cheese. Cook a remaining 6 minutes.
Once done, allow to cool a bit, sprinkle the grated parmesan cheese over the chicken then serve.