This might be a local thing, but in my experience shops work hard to obfuscate the receipts as much as possible. If they're competing on price, their tactic is usually to promote a few random products they have the best price on and then hope you'll pick their store to buy all your groceries. For that reason, they are absolutely against giving you raw data, because that would allow you to make a shopping list and find the store with the best total price.

I remember some people tried to do an app that would let you scan receipts and make comparisons, but they gave up. Even stores from the same huge chain would have different prices for the same item and a different name on the printed receipt as well. I don't want to get into conspiracy theory territory, but it looked very deliberate.

Eastern Europe here BTW.