Slice the onions ¼ inch thickness into rings. In a small bowl add the flour and baking powder. In another bowl add the eggs and whisk. And in the last shallow dish add Panko, parmesan cheese, paprika and garlic powder.
Dip one onion ring in the flour, then the egg, and lastly in the Panko mixture. Repeat with all of the onion rings.
Add the onion rings to the air fryer basket and put in a single layer. Spray the onion rings with the olive oil spray. Cook at 360 degrees for 8-10 minutes or until golden brown.