Solved - How to get Three Esim QR code from Gmail Email
The QR code in your email when opened with Gmail will not show up. No matter what browser I used it would not show, however when I opened the email with Outlook or my phones mail app which I never normally do, the QR code was visable.
Take a screenshot if you are using your phone to open the email, and then when adding the Esim on your phone, choose to scan QR code option, click the image function botom right then select your screen shot and you can proceed!
I think the issue is likely to do with Google restricting QR codes showing to prevent phishing from the many scam artists out there.