Prep the chicken. Pat the chicken dry with paper towels.
Cut into 1- to 1.5-inch pieces so they cook evenly. Aim for bite-sized chunks, not strips.
Season. In a large bowl, toss the chicken with olive oil, salt, garlic powder, onion powder, smoked paprika, black pepper, and optional cumin and cayenne. Mix until every piece is coated.
Preheat the air fryer. Set to 400°F (200°C) for 3–5 minutes.
A hot basket helps with that light crust.
Arrange the nuggets. Lightly spray the basket. Place the chicken in a single layer with a little space between pieces. Work in batches if needed to avoid overcrowding.
Air fry. Cook for 8–10 minutes, shaking the basket or flipping the nuggets halfway through.
Start checking at 8 minutes.
Check doneness. The internal temperature should reach 165°F (74°C). The edges should look a bit crisp and the centers juicy.
Rest briefly. Let the nuggets sit on a plate for 2–3 minutes. This helps the juices settle.
Serve. Squeeze a little lemon over the top and serve with your favorite dips.