This page has the combination of the words and products that I needed to translate from UK to US. I’ll keep adding to it as I go along.
“passata”- It is not tomato sauce, although its texture is similar, because the tomatoes are minimally cooked before processing. It has a sharp fresh tomato taste. While I did find a source for it at the store- it is pricy and a large volume (hint- really good on roasted spaghetti squash that has been mixed with parmesan and a bit of butter). I think that a good substitute I will try next time is to blend up a can of small diced tomatoes that come in sauce- Even though that will have more skin and seeds than
found in passata- it will have the fresh taste and also similar lower sodium than standard pizza sauce.