Heat air fryer to 400 degrees. In medium bowl, mix pecans, arrowroot starch, Italian seasoning, onion powder, garlic powder, and 1/4 teaspoon sea salt.
In separate bowl, whisk egg, 1 teaspoon Dijon mustard, water and garlic. Cover pork chops in egg mixture, then transfer to bowl with pecan mixture to coat all sides.
Repeat with remaining pork chops. Place three pork chops in air fryer basket. Cook pork chops 6 minutes, flip, then cook an additional 6 minutes. Set aside on plate.
Repeat with remaining pork chops. Serve hot with Dijon mustard, if desired.