Also if you happen to know, I wonder if by any chance my parents get PR letter anytime soon, are they able to do the landing in Canada by air? Did Canada open the border again for PR landing (by air)?That's a bit of a ridiculous ask. Would you able to get proof from their secondary and high school? If not, you may have to write a letter stating that your parents have no records and neither does the school/ school doesnt exist any longer and ask for advise on next steps.
Thank you!