I lived in Italy (Sicily) for a number of years. I’ve never found oregano in the US the can even come close. It’s similar with tomatoes except, some home grown tomatoes are really good.
The real mozzarella cheese is another thing. I’ve thought about trying to make my own mozzarella.
The Europeans keep the good stuff and send us the garbage. Was on Rhodes a few years ago. Olives, Olive oil with fresh baked bread, and goat cheese. Everything tasted like candy.