Really depends early GenZ was born in the late 90s/early 00s, and I can Attest that there's quite a few who're pretty good with computers. Mostly depends on what you got in touch with at home.
Now, Gen Alpha, I'd say, is on average proper fucked regarding computer knowledge.
Or, more to the point, the generational blocks don't really matter much for this, but there's certainly a declining aclemation with basic OS concepts.
Computers filled rooms back when the boomers (and earlier gens) were creating them, so even a desktop isn't how they were known then. But it laid the groundwork.
Was Franklin laying the groundwork for computers as we know them when he discovered electricity? You have to cut things off somewhere for a statement like that.
So then the Greek Antikythera mechanism counts too then? Or maybe the Bell transistor. My point is that none of these things resemble computers as we know them.
That's like saying that nerdy millenials invented mRNA vaccines. A very small percentage of the population worked on them while the rest weren't even aware they existed for most of that time.