In my experience in working in Canada the records check is done after an offer is extended since it is not free, requires the consent of the person being checke

In my experience in working in Canada the records check is done after an offer is extended since it is not free, requires the consent of the person being checked, and takes several days at best, so it would be very obvious why the offer was retracted. I haven't said anything incorrect. I said that employers can only factor convictions, not that they can't get access to other records.