Preheat the air fryer to 400ºF. Spray the air fryer basket with cooking spray. 

Next, place the sliced zucchini in a bowl and toss with olive oil. Set aside. 

In a separate bowl, add parmesan cheese, garlic powder, pepper, cayenne pepper, and salt to a bowl and mix. 

Dredge each oiled zucchini round through the parmesan mixture. Be sure that the zucchini rounds are completely covered in the parmesan mixture. Place each zucchini round on a separate plate. 

Once all the rounds are coated, line the bottom of the air fryer with the coated zucchini. If you have a smaller air fryer you may have to cook the zucchini in a couple batches. 

Spray the zucchini with non-stick cooking spray and cook the zucchini in the air fryer for 3-4 minutes or until golden brown. 

Carefully remove the zucchini from the air fryer with a spatula or fork. 

Serve immediately.