This is not the case in most EU. Also note that it'll also make a even bigger tracking mechanism than having a centralised API in the first place. For example

This is not the case in most EU. Also note that it'll also make a even bigger tracking mechanism than having a centralised API in the first place. For example the QR-code bearing receipts from Germany have a signed proof of commiting the transaction to HSM, but not the details. Online-capable cash registers in Poland submit only hourly statistics centrally.