Hi and welcome to the forum,
I think you might be confusing the different Cubase Editions - there is Cubase LE and AI, which you get free with some Hardware products, and which don’t contain Pitch Correct, and there is Cubase Elements, which is the smallest paid edition, which contains Pitch correct.
So you probably just have AI or LE (those were the ones where Steinberg offered the free upgrade to 12), but don’t worry, there is a free pitch correction software from Melda called MAutopitch which you could install and use.