To renter Canada you will need your PR Card or a PRTD. An eCOPR is not a travel document. I would respond by email to one of the last PR emails you received indicating that you are concerned that your PR card may be missing as it did not arrive with the others and let them know your travel dates.Anybody faced the same?? i am scared ,i am travelling next month....is it possible i can enter without PR card?
Review the following if you want to get a PRTD:
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/application-forms-guides/guide-5529-applying-permanent-resident-travel-document.html#