Grease the Air Fryer Basket with cooking spray and then slide inside.
Adjust the temperature of Air Fryer to 400 °F to preheat for 5 minutes.
Coat each cob with some butter.
After preheating, arrange the cobs into the greased Air Fryer Basket in a single layer.
Slide the basket into Air Fryer and set the time for 10 minutes.
While cooking, flip the cobs once halfway through.
Meanwhile, in a small bowl, mix together the remaining butter, lime juice, chili powder, salt, and black pepper.
After cooking time is finished, remove the cobs from Air Fryer and place onto a plate.
Brush the cobs with butter mixture top with feta cheese.
Garnish with cilantro and serve.