Preheat your air fryer to 400°F.
Butterfly the chicken breast or pound it to an even 1/2-inch thickness for uniform cooking.
In a shallow bowl, whisk the egg until smooth.
In a separate shallow bowl, combine the Parmesan cheese, almond flour, garlic powder, oregano, sea salt, and black pepper.
Dip the chicken breast into the egg wash, then dredge it through the Parmesan mixture, pressing firmly to ensure a thick crust.
Lightly coat the air fryer basket with olive oil, place the chicken inside, and air-fry for 10-12 minutes, flipping halfway through until golden and crispy.
While the chicken cooks, warm the marinara sauce in a small saucepan over medium-low heat.
Sauté the zucchini noodles in a separate pan with a splash of water for 2-3 minutes until just tender, then drain any excess liquid.
Place the zucchini noodles on a plate, top with the crispy chicken breast, and finish with a generous pour of warm marinara sauce.