that’s kind of double edged sword. If Apple would be to mask your purchases, they would most likely have to know about what the purchases are to hide them from the Bank. But in current state I assume (based on the infographic I posted in separate comment), that Apple doesn’t know about the purchases much, thus they are not masked on the bank’s side.
But I am no expert in this matter, so I may be wrong.
I’m not entirely sure if this fully answers your question or if it’s still accurate, but I came across a graphic comparison a while ago that illustrates how Apple Pay and Google Pay handle payment tokens. According to this infographic, it can be assumed that Apple does not pass every payment through their own servers. As a result, even if they do store some information, it’s likely not much.
hmm, a shame that this website is not listing anything on the icloud mail in regards to privacy. would be nice if it would show what problems are with it in terms of privacy