I don't know if you're asking about the powdered cheese that's sprinkled on the pasta after it's made.

This type is Grana Padano, which is what the Italians use, and which is also available in packaged form in Italian supermarkets. There is also a Parmigiano reggiano Parmesan cheese, but this cheese is not usually used to spread pasta, because it is very expensive, the flavor is very good, suitable for eating directly.

There is also Parmigiano reggiano parmesan cheese.