I didn’t get checked in Porto.
Also, I bought two earlier. My UEFA account is linked to my passport number. But bought the second under the same transaction and did not need to provide a passport number or UEFA account.
I received a confirmation email that said this:
“Please also note that for security reasons, the local authorities may request the full details of each attendee at any moment. If there is a request from the local authorities, we will contact you with instructions on how to proceed.”
That to me insinuates that they do not have the passport number on the ticket… but that they might request the info over the coming days.