Combine cream cheese, chicken, Cheddar, scallion, hot sauce and dill in a medium bowl; stir until well combined. Clean seeds and membranes from jalapeños and stuff evenly with the cream cheese mixture. Sprinkle with breadcrumbs. Place the stuffed jalapeños in the basket of an air fryer; coat with cooking spray. Cook at 370 degrees F until the tops are browned and the jalapeños are tender, about 10 minutes.