There’s a book I read about this. I don’t remember the title, but it was written by some US senator or house rep, probably had a ghostwriter. It was about that, some enemy of the US, maybe it was China or Russia, detonated a bunch of nukes high in the atmosphere, causing the US’s electronics to be fried.
Assuming they did their research, the book had people survive for years, but definitely addressed how hard it would be. There was looting & rioting, the family had to eat their dog eventually, and there was a massive change in the importance of trust & community. I think it was like 3 years later that the reconstruction reached the small town, and it ended along the lines of “and then there was more work.”