They notified me of my expiry date, which is in about a year from when my medical exam was. the email states:
"After reviewing your file, we noticed that your COPR will be valid until 2025-04-15 . This means that you must land in Canada before that date. If you think you can land before the expiry of the COPR, then our office can go ahead and finalize your application.
If you need more time to land, then our office can request an extension. Please be aware that for an extension of the COPR to take place, the medicals will need to be reassessed/new medicals will be required - which can take several weeks."
So, I told them that I am able to land before that date. I'm not sure if it is supposed to imply that I am expected to go to Canada, or if I am still waiting for my passport to be mailed back to me at my current American address, which is what I assume I am waiting for, hopefully along with my immigrant visa.