In a large mixing bowl, combine softened cream cheese, sour cream, and mayonnaise until smooth and well blended.
Stir in 3/4 cup mozzarella cheese, 1/4 cup Parmesan cheese, chopped artichoke hearts, spinach, garlic, onion powder, salt, and pepper until evenly combined.
Transfer mixture to an air fryer-safe baking dish that fits in your air fryer basket, spreading it into an even layer.
Sprinkle the remaining mozzarella and Parmesan cheese over the top.
Place the dish in the air fryer basket and cook at 350°F for 12-15 minutes, until the dip is hot throughout and the cheese on top is melted and golden brown.
Let cool for 5 minutes before serving with your favorite dippers.