In a small bowl, add the olive oil, garlic powder, paprika, Italian seasoning, salt, and pepper. Stir together to make a paste.
Pat chicken dry with paper towels and set it in the basket of your air fryer or on a plate. Brush half of the seasoning mix onto the chicken then flip and brush the second side evenly.
Alternatively, you can shake the chicken in a zip-top bag with the seasoning (which is great if marinating ahead). Set the chicken in the air fryer basket in a single layer, skin-side-down.
Air fry at 375ºF for 18-22 minutes (flipping halfway). Cook until the internal temperature of the chicken reaches 165ºF at the thickest point on an instant-read thermometer. Cook times may vary depending on your air fryer and the size of your chicken thighs (see note).
Once cooked through, transfer to a plate and rest for 5 minutes then garnish with chopped parsley if desired and serve.