01 - Set the air fryer to 360°F and preheat for 5 minutes.
02 - Divide pizza dough into 4 equal portions. Roll each into a 6-inch circle on a floured surface.
03 - In a bowl, combine chicken, mozzarella, Parmesan, Alfredo sauce, spinach (if using), garlic, Italian seasoning, salt, and pepper. Stir until well mixed.
04 - Spoon one fourth of the filling onto half of each dough circle, leaving a 1/2-inch edge. For extra crispiness, sprinkle shredded cheddar cheese over filling if desired.
05 - Fold dough over the filling to create a half-moon shape. Pinch and crimp the edges with a fork to seal firmly.
06 - Brush the tops with beaten egg and then lightly brush or drizzle with olive oil.
07 - Place calzones in the air fryer basket in a single layer. Cook at 360°F for 12 to 15 minutes, until golden brown and crispy. Work in batches if required.
08 - Let calzones cool for 2 to 3 minutes before serving.