Prep the skewers: If using wooden skewers, soak them in water for at least 20–30 minutes to prevent scorching in the air fryer.
Cut the chicken: Slice chicken into 1 to 1.5-inch cubes. Aim for uniform size so everything cooks evenly.
Mix the marinade: In a large bowl, combine olive oil, minced garlic, parmesan, lemon juice, Italian seasoning, paprika, onion powder, salt, pepper, and a pinch of red pepper flakes if you like heat.
Coat the chicken: Add chicken to the bowl and toss until every piece is well coated.
The mixture should be thick and clingy from the parmesan.
Marinate: Cover and refrigerate for at least 20–30 minutes. For deeper flavor, marinate up to 4 hours. Don’t go overnight or the lemon can toughen the meat.
Preheat the air fryer: Set to 380°F (193°C) for 3–5 minutes.
Lightly oil or spray the basket to prevent sticking.
Thread the chicken: Skewer the marinated chicken, packing pieces snugly but not squished. Leave a little space at the ends for easy handling.
Cook the first side: Arrange skewers in a single layer in the basket without crowding. Air fry at 380°F for 6 minutes.
Flip and finish: Turn the skewers and cook 4–6 minutes more, until the chicken hits 165°F (74°C) in the thickest piece and edges look golden and crisp.
Rest and garnish: Let skewers rest 3 minutes.
Sprinkle with extra parmesan and chopped parsley. Serve with lemon wedges.