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.