Add the chicken, zucchini, and squash in a ziplock bag.
Add the flour to the bag. Close the bag. Shake to cover everything in flour.
Whisk together 1 egg. Add to the bag. Close and shake to cover everything in egg.
Add in the parmesan, breadcrumbs, and italian seasoning to the bag. Close and shake.
Preheat the air fryer to 380 F for 5 minutes.
Spray the air fryer basket lightly with oil.
Place the mixture in the air fryer basket and spread it out evenly. Use a spatula to separate any pieces that are stuck together for more even cooking. Spray food lightly with oil.
Air fry at 380 degrees F for 10-15 minutes, or until cooked through and golden. Chicken should reach 165 internal temp. Air fryers vary - time can be longer. Check it often after the 15 minutes.