Place the Panko breading in a ziplock bag. Use a mallet and pound until finely ground. Or use a food processor and pulse for 30 seconds.
Toast the Panko breading in a nonstick skillet for a minute or until golden brown. Remove from the pan and transfer to a plate. Cool for at least 5 minutes.
Lay a plastic wrap on a cutting board or flat surface. Place the pork chop in the middle, and then cover. Use a mallet and pound the meat to tenderize. Set them aside. Start preheating the air fryer to 375ºF for 10 minutes.
Make the batter. In a shallow bowl, combine the eggs, flour, and water. Whisk until smooth. Prep two breading stations, one for the batter and the other one for the toasted Panko.
Dip the pork chop in the batter, and then dredge into the cooled toasted Panko, press firmly to cover the pork chop. Repeat for the rest of the chops. Set them aside.
Remove the air fryer basket and spray with oil. Fry the pork chops in batches for even frying (place 2 pieces at a time). Fry at 375ºF for 15-20 minutes on each side depending on the thickness or until the internal temperature reaches 145ºF. After frying, place them on a cooling rack for 5 minutes before slicing.
Meantime, while the pork chops are in the air fryer, make the sauce. In a saucepan over medium heat, combine soy sauce, oyster sauce, apple cider vinegar, brown sugar, ketchup, water, and cornstarch. Constantly stir until the sauce thickens.
Stir fry the veggies. Heat a wok with oil. Add the onion, and saute until translucent, then add the mushrooms continue sautéing until tender. Stir in the garlic and ginger, and saute until fragrant, then season with salt and pepper to taste.
Add the rest of the veggies, cook until tender. Drizzle sesame oil at the end of cooking. Serve the Tonkatsu Pork with the stir fry veggies.