I always wondered about this. It feels like the information gets compressed or summarized a bit. I know this because when I previously had fraud charges I had to dispute the credit card company could report with some amount of accuracy the items that made up the transaction as well as in other transactions that they took the time to vet for fraud as well since they had me on the phone. It wasn’t brand or sku number granularity it was more categorical, clothing, maybe a sweater or something coarse like that. Perhaps the credit card companies do have this information but anonymize it a bit for the customer service folks?