I think part of the confusion comes from the EU region cards sold in French areas of Canada also have the ESRB rating (vs. the PEGI one).
Looking back at a thread from last month where this same issue arose – those cards also showed ESRB – even though they said for EU region only.
Link: Gametime cards sold in Canadian mall for CAD$ cannot be used in Canada - #8 by Wog-aegwynn
Screenshot link from thread: https://imgur.com/a/wFFgOk0