I was never able to link either. Did you get your PR card application number and using that with your UCI or other details? You'll have to call IRCC to get that info.
I was told by IRCC that sometimes you can't link/track PR card applications before 2 months. Of course, that's not entirely true. But that's the state of the system. Just call IRCC at the 1800 number and get the update. Don't worry too much about it. If you don't get your PR card in 2 months, worth calling them and checking if they shipped your PR card and if it was never delivered. CanadaPost is notoriously bad with deliveries.