Preheat an air fryer to 400 degrees F (200 degrees C).
Place flour in a bowl. Beat eggs in a separate bowl. Place bread crumbs in a third bowl.
Coat jalapeno rings first in flour, then in egg, and finally in the bread crumb mixture.
Place jalapeno rings in the basket of the air fryer, making sure none are overlapping. Spray the tops with cooking spray. Cook for 4 minutes. Flip the jalapeno rings over and spray the tops with more cooking spray. Cook for 4 minutes more. Repeat with remaining jalapeno rings. Serve with ranch dressing for dipping.