Unroll the crescent roll dough and separate into triangles. Place 3 slices of pepperoni and a pinch of shredded mozzarella on the wide end of each triangle, then sprinkle lightly with italian seasoning.
Roll each triangle up from the wide end to the point, tucking the filling in as you go.
Preheat the air fryer to 325°F (165°C). Place the rolls in the basket with the point side down and a little space between each one.
Air fry for 7 to 9 minutes until puffed and golden brown all over.
Mix the melted butter with garlic powder, brush over the hot rolls, and sprinkle with grated parmesan cheese.