In a medium frying pan, heat 2 teaspoons olive oil over medium heat for 30 seconds.
Add onion and mushrooms.
Cook for 4 minutes until onion is translucent.
Add napolitana sauce and stir.
Remove from heat.
Preheat air fryer at 190°C for 3 minutes.
Rub remaining 2 tablespoons olive oil over both sides of eggplant circles.
Lay out slices on a large plate and season evenly with salt.
Top evenly with sauce mixture and shredded mozzarella.
Place half of eggplant pizzas in ungreased air fryer basket.
Cook for 5 minutes.
Transfer back to plate.
Repeat cooking with remaining pizzas.
Garnish pizzas with chopped basil and serve warm.