Preheat the air fryer to 380 degrees F.

Place chicken breasts between two pieces of plastic wrap and pound to an even thickness of about a half inch.

In a shallow dish, mix together breadcrumbs, Parmesan cheese, Italian seasoning, salt, and pepper. In a separate dish, drizzle olive oil over the chicken breasts and coat evenly.

Dip each chicken breast into the breadcrumb mixture, pressing gently on both sides to adhere.

Place the breaded chicken in the air fryer basket in a single layer. Cook for 10 to 12 minutes, flipping halfway through, until golden brown and the internal temperature reaches 165 degrees F.

Remove the chicken from the air fryer. Spoon marinara sauce over each piece and sprinkle shredded mozzarella cheese on top.

Return the chicken to the air fryer and cook for an additional 3 to 5 minutes, until the cheese is melted and bubbly. Let the chicken rest for a couple of minutes before serving. Garnish with fresh basil or parsley if desired.