Hey! I'm a Gen X'er. Granted I am in the oldest group of them born two months into the group. I have three millennials (all daughters) and a Gen Z'er too (son). All of them have been out in the garage with me. I learned what I know about these cars by working on mine and reading and asking questions, my old man was of the silent generation and boy was that true, he;s was silent about cars for the most part he didn't touch them. My kids at least know their ways around a tool box. Heck, my oldest was a mechanic in the Army. But to be honest if my daughters have car problems they come to Dad to fix it, they are out there helping though. The son isn't old enough to drive, yet. Getting close though.
Funny story about my oldest, the Army mechanic. After she got out she came back home and had a car issue then asked if I would look at it. being Dad I said ok, then I remembered what she did in the Army. Asked her "hey, weren't you a mechanic in the Army? Why am I looking at it? Do you want to borrow my tools?" She said "I was a diesel mechanic, I don't know anything about gas engines." I asked her if it was an engine problem and she said no, so I said "So, why am I looking at it?" I got the look and she just asked me to look at it again.
Turns out her dome light wouldn't turn off so she pulled the bulb to keep it from killing the battery. Once I explained to her that her headlight switch will also keep the bulb on if you rotate it past the detent then she was like "duh". Problem solved in about two minutes. Guess she didn't do electrics either, either that or Army vehicles don't have dome lights, I dunno I was Navy..