Combine turkey, parsley, salt, pepper, garlic and onion powder in a large mixing bowl. Divide into 8 equal portions and form into small patties. Spray Air Fry Kit with cooking spray and arrange slider patties on top. Optionally, spray top of patties with water for a crisp surface.
Place Air Fry Kit into machine. Press “Air Fry” button and rotate knob to navigate to 425° and press to set temperature. Rotate knob to navigate to 14 minutes and press knob to start. After 14 minutes, remove Air Fry Kit and top sliders with cheese. Return Air Fry Kit to machine and Air Fry at 350°F for 2 minutes, until cheese is melted.
While sliders cook, combine mayonnaise, ketchup, relish, honey, vinegar and pepper in small bowl. Spread sauce on cut side of slider buns.
Stack turkey slider patties on slider rolls with lettuce, tomato and onion.