01 - Set the air fryer to 360°F and allow it to preheat for 5 minutes.
02 - Divide pizza dough into 4 equal portions and roll each into a 6-inch circle on a lightly floured surface.
03 - Combine chicken, mozzarella, Parmesan, Alfredo sauce, spinach if desired, garlic, Italian seasoning, salt, and pepper in a mixing bowl, mixing thoroughly.
04 - Evenly distribute one-quarter of the filling onto half of each dough round, leaving a half-inch margin at the edge.
05 - Sprinkle cheddar cheese over the filling for a cheesier and crispier crust if preferred.
06 - Fold dough over filling to create a half-moon. Pinch edges firmly to seal and crimp with a fork for reinforcement.
07 - Brush tops with beaten egg and then apply a light coating of olive oil using a pastry brush.
08 - Place calzones in the air fryer basket in a single layer. Cook in batches if needed to avoid overcrowding.
09 - Air fry at 360°F for 12 to 15 minutes, until crust is golden brown and crisp.
10 - Allow calzones to cool for 2 to 3 minutes before serving to set the filling.