HI, if you do not land with your current COPR and it expires there are high chances that you will have to redo the process from the start. I mean from going back to the pool and wait for an invitation. The following has been said about the valid COPRs by IRCCHi
My COPR is expiring in Dec 2021 and due to some personal circumstances, I won't be able to travel to Canada to complete the landing procedures.
What are the implications?
Will I be able to request an extension of COPR?
"We expect people with a COPR and permanent resident visa that are valid until October 1, 2021 or after to have enough time to come to Canada before their documents expire. "
God be with you.