E-brevet doesn't link to the event results (it may in future) so your name won't be on the results until the organiser has added you. For a calendar event you still need to hand in a brevet card at the finish (or send if postal).
Ah, I think this was not clear to me.
might as well have just signed the card and given it straight back to the organiser at the start, since there was no one at the finish, being given a brevet card, that I must then post to someone, even though proof has been supplied digitally seems like French bureaucracy.
In fact looking back at the event email, photos of the paper brevet were sufficient for those not on e-brevet.
Luckily it was not a AAA ride, and it was not my only ride for the month, so no great loss.