Preheat your air fryer to 199 °C (200 °C) for 3 minutes to ensure even cooking.

Snap or cut off the tough, woody ends from the bottom of each asparagus stalk.

In a shallow dish or large bowl, toss the prepared asparagus with olive oil, garlic powder, salt, and black pepper until uniformly coated.

Arrange the seasoned asparagus in a single layer in the air fryer basket, ensuring they are not tightly overcrowded.

Air fry at 199 °C for 6 to 8 minutes, shaking or flipping the basket halfway through, until spears are tender-crisp and browned at the tips.

Transfer to a serving plate, sprinkle with grated Parmesan cheese, and drizzle with fresh lemon juice before serving immediately.