Slice the eggplant into 1/4 inch thick pieces and arrange them in a colander or on a baking sheet. Sprinkle with salt and leave for at least 15 minutes to release moisture.
Set your air fryer to preheat at 370 degrees Fahrenheit.
Pour the beaten egg into a shallow dish and combine the breadcrumbs, Parmesan, garlic powder, and basil in another shallow dish.
Coat each eggplant slice by first dipping it into the egg, then pressing it into the breadcrumb mixture, ensuring an even covering.
Place the coated eggplant slices in a single layer inside the air fryer basket without overlapping and cook for 8 to 10 minutes, flipping halfway through and lightly misting with oil to get crispy edges.
Spoon a small amount of marinara sauce over each cooked slice and sprinkle mozzarella cheese on top.
Return the basket to the air fryer and cook just 1 minute more. Then turn off the air fryer and let the cheese fully melt by leaving the slices inside for another minute.