Plenty of cases where PR cards were sent but never received. Happened with my own dependent too. Just call IRCC and see if they sent you a PR card. If they did so and you never received at the address, ask them to send the re-request form again. Your PR cards will take 3-4 months from the time of re-request to reach your address.
Hello,
I'm in a same situation, I received my PR card along with spouse n a kid, but 2 kids PR card never received since Jan 16 (ECoPR), for one kid they asked to upload a new photo online, I did the same day, but no result, I raised the web form and I got the reply today that one kid application is still under process, and the other ones photo send to their mailing address ( I have already uploaded but probably they didn't notice).
What you suggest in this situation or anyone in this same boat... please advise