Place grated zucchini in a colander and sprinkle with 1 teaspoon of salt. Let sit for 10 minutes to draw out moisture.
Using a clean kitchen towel or cheesecloth, squeeze out as much liquid as possible from the zucchini. This step is crucial for crispy fritters, so really wring it out!
In a large bowl, combine the squeezed zucchini, eggs, flour, Parmesan, mozzarella, green onions, garlic, black pepper, onion powder, and paprika. Mix until well combined.
Preheat your air fryer to 375°F for 3 minutes.
Line the air fryer basket with parchment paper and spray lightly with cooking spray.
Scoop about 2 tablespoons of the mixture for each fritter and form into patties about 1/2 inch thick. Place in the air fryer basket, leaving space between each one.
Spray the tops of the fritters lightly with cooking spray.
Air fry for 12-15 minutes, flipping halfway through, until golden brown and crispy on both sides.
Transfer to a serving platter, garnish with fresh dill, and serve warm with sour cream for dipping.