Theoretically if that did somehow happen I’d imagine it’d just be like Amish country, they make it work without electricity and still have decently high standard of living.

Realistically though that won’t and can’t happen, we already have the knowledge, it would take something unbelievably cataclysmic to erase all traces of that knowledge from the world. Even if there was a collapse of general infrastructure people would still throw up windmills and water wheels and such to generate electricity on small scale at the absolute worst case.