Hello, same problem here.
I recently purchased a Fairphone 4 and after updating the operating system to Android 12, I am trying to transfer my WhatsApp data from my old iPhone using a cable, as suggested by the official WhatsApp guide. WAfaqs
However, I am not succeeding in this because during the process (I have already tried several times), the following step is missing and I don’t know why “use the iPhone camera application to scan the QR code when prompted and open iOS WhatsApp to export the data.”. The QR code never appears on my Fairphone 4 and apparently, there’s no other way I’ve tried to transfer the data successfully.
I wanted to see if anyone else is encountering the same problem and if anyone has already solved it. Thank you.