Preheat the air fryer to 370°F.

In a large bowl, drizzle olive oil over the asparagus and season with salt and pepper. Toss to coat evenly.

Arrange the asparagus in a single layer in the air fryer basket, ensuring they are not overcrowded. If necessary, cook in batches for best results.

Air fry the asparagus for 6 minutes, or until they are tender and the tips are crispy. Flip the spears halfway through the cooking time.

Once cooked, transfer the asparagus to a serving platter, squeeze lemon over the top, and add additional salt and pepper if desired.