In a bowl, mix tomato paste, lemon juice, vegetable oil, garlic powder, dried parsley, salt, and pepper.
Make a few slits in the chicken thighs to help the marinade absorb.
Rub the marinade all over the chicken thighs, making sure it gets into the slits.
Let it sit for at least 20 minutes to marinate.
Preheat your air fryer to 360°F (180°C).
Place the marinated chicken thighs in the air fryer basket in a single layer.
Cook for 20-25 minutes, flipping halfway through, until the internal temperature reaches 165°F (75°C).