Place the asparagus in a shallow bowl and drizzle with olive oil. Sprinkle with garlic powder, salt, and pepper and toss to coat.
Transfer the asparagus to the preheated air fryer basket, making sure to spread them out in an even layer.
Cook at 400 degrees F for 4-6 minutes until the asparagus are tender and crisp. Shake the basket after 2 minutes.
Remove the asparagus from the basket and transfer them to a serving platter. Squeeze half of the lemon wedges over the asparagus. Save the remaining lemon wedges placing them around the serving platter.
Sprinkle all over with parmesan cheese and serve warm.