Lightly coat pork chop with cooking spray; sprinkle with salt and 1/4 teaspoon of the pepper. Whisk together oil, syrup, mustard, and remaining 1/4 teaspoon pepper in a medium bowl; add Brussels sprouts; toss to coat. Place pork chop on 1 side of air fryer basket, and coated Brussels sprouts on other side. Heat air fryer to 400ºF, and cook until golden brown and pork is cooked to desired temperature, about 10 minutes for medium or 13 minutes for well-done.