I'm having this same problem. When I go to connect Opera on my laptop with Opera on my phone (Samsung Galaxy S23), I scan the QR code using my phone and it tells me to "follow the instructions on your other device" but that only ever takes me to a page that says "Congratulations! You're logged in" and links away to other pages where I can choose what data to synchronize, but it has no directions to follow for completing the connection between my two Opera logins.
Does anyone know how to fix this issue?? It's maddening not to be able to share links between my devices more easily