Age influences literacy a lot in my opinion. As a kindergartner you can be literate by reading the writing and spitting words out but you may not comprehend them.
Literacy can be different in the way we use literacy. When writing papers you won’t to use correct grammar which can be categorized in “correct literacy.” When texting or just writing notes in class you can use acronyms and it still be considered literacy because you personally understand the form it is being wrote in.
Children don’t always understand literacy but they can spit out words, do they really know how to pronounce them from the way they look or because they hear their teachers/peers/parents saying them? What do you think?