I was looking at the back of one of LO's books (one of those early readers) and it has preschool as learning to read. My LO is in preschool and they aren't learning that yet, but maybe next year in the 4's program they will? I didn't start learning to read until I was 5 and that was really basic stuff like sight words, then we got into it more in 1st grade.
If your LO can read, how old are they? How old were you when you learned to read?