I wouldn't call bread or yoghurt prepared instead of processed personally though, they've been through multiple chemical and biological processes.

Ultra processes foods is something that tends to be more appropriate I think. That's stuff like chips or fast food. Though even that I consider fine to eat in moderation, and I, personally, do. Though I agree it would be better if I completely cut those out. I just tend to eat a lot of pre-made foods due to disability reasons (frozen pizzas, pastas, and the like)

But yeah, I do know that the US has some very lax food laws unfortunately. So maybe that is a big part of the difference