Toast panko with oil in microwave 1–3 min; mix with Parmesan.
Whisk egg, flour, garlic powder, oregano, salt, and pepper.
Pound, season, dredge chicken in egg and panko mixtures.
Air‑fry at 400°F for 12–16 min, flipping halfway.
Top with mozzarella; air‑fry until melted; garnish basil; drizzle marinara.