Place the chicken breast between two sheets of parchment paper and pound to a uniform half-inch thickness.
In a shallow bowl, whisk the egg; in a second bowl, combine almond flour, parmesan cheese, garlic powder, oregano, sea salt, and black pepper.
Dip the chicken into the egg wash, then press firmly into the almond flour mixture until thoroughly coated on both sides.
Place the chicken in an air fryer at 375°F for 12-15 minutes, flipping halfway through, until the coating is golden and the center is cooked.
Spoon the marinara sauce over the chicken and top with shredded mozzarella; air fry for another 2 minutes until the cheese is bubbly.
Lightly sauté the zucchini noodles in a pan for 2 minutes and serve the chicken on top, garnished with fresh basil.