It's not a PoC, CoronaCheck is the app that will be used in The Netherlands for generating QR codes. The domestic QR code will be much more friendly with respec

It's not a PoC, CoronaCheck is the app that will be used in The Netherlands for generating QR codes. The domestic QR code will be much more friendly with respect to privacy as explained by radicalbytes. The reason that it's not been adopted by the EU is because member states want to set their own rules for entry. For example, some countries consider previous infection + 1 dose as fully vaccinated, others do not. Some countries approve non-EMA approved vaccines, most do not. That's why it's necessary to include more details. I think you have to remember that everything is a trade-off, if you want a more privacy-friendly solution, there will be a cost at some point.