Preheat your air fryer to 425F for three minutes.
Gently scrape off any sauce, cheese, pasta or vegetables from your leftover chicken parm onto a plate and set aside, leaving the driest cutlet possible.
Add just the cold cutlet with no toppings or sides to your air fryer basket.
Heat for three minutes. Pull out the basket and use tongs to turn the cutlet.
Heat for another two to three minutes until crisp and heated through. Use tongs to transfer to a plate.
Note: While your cutlet is reheating, add your sauce, cheese, pasta and/or vegetables to a microwave-safe dish, cover and reheat separately for about a minute on high, stirring, then another 30 seconds; OR add to a skillet on medium then cover and reheat for five minutes, stirring occasionally.
Add your heated sauce and cheese to the top of your air-fried cutlet and any reheated leftover pasta and vegetables to the side on the same plate.