You’ve just explained back to me what I have said, you can confirm details. Under GDPR you should not be reading the details back, the customer should provide the details and you can either say yes or no to confirm what you have is correct or incorrect. I speak to the Department for Communities and PIP often and they will never read out my details back to me. Only confirm that the details they have are correct or say they don’t match and update them. My energy provider won’t confirm anything back to me, if I ask what phone number they have for me they ask me to confirm my number and say either that’s the correct number or that number does not match the one on file would you like to update your number. This is the same everywhere I’ve worked since 2018.
The DVLA are following the law by not providing this information via email.