Preheat the air fryer to 400°F (200°C).
In a large mixing bowl, combine the olive oil, garlic powder, smoked paprika, dried oregano, salt, and pepper.
Add the chicken thighs to the bowl and toss to coat evenly with the seasoning mixture.
Transfer the seasoned chicken thighs to the air fryer basket in a single layer.
Cook the chicken for 10-12 minutes, flipping halfway through for even browning.
After cooking, squeeze fresh lemon juice over the chicken before serving.
Let the chicken rest for a few minutes before slicing and serving.