01 - Preheat the air fryer to 360°F for 5 minutes.
02 - Divide the pizza dough into 4 portions. Roll each into a 6-inch circle on a lightly floured surface.
03 - Combine chicken, mozzarella, Parmesan, Alfredo sauce, spinach if using, garlic, Italian seasoning, salt, and pepper in a mixing bowl. Stir until evenly mixed.
04 - Arrange a quarter of the filling onto half of each dough circle, leaving a 1/2-inch border at the edge.
05 - Sprinkle shredded cheddar cheese over the filling for a cheesier crust if desired.
06 - Fold the dough over the filling to form a half-moon. Press edges to seal and use a fork to crimp.
07 - Brush the top of each calzone with beaten egg and drizzle or brush lightly with olive oil.
08 - Place calzones in a single layer in the air fryer basket. Cook in batches if necessary.
09 - Air fry calzones at 360°F for 12–15 minutes until golden brown and crisp.
10 - Let calzones cool for 2 to 3 minutes before serving.