The time from portal submission to eCOPR varies. Few receive within weeks, and others months. It depends on the nature (country, VO, etc.) of the application, I suppose. IRCC agent mentioned that the preference is given to the ones already residing in Canada.
We received portal credentials on Aug 18 > submitted details on Aug 20, and then got our eCOPR on Nov 05. We received eCOPR communication via email asking to download soft-copy from the VL portal. Hope this helps.
Application started in Dec 2019. It took us nearly 2 years, and for sure it has been a frustrating wait.
One thing that we kept on doing was to call IRCC every month to let them know our situation and seek any further status because IRCC portal is not frequently updated. Be respectful, ask relevant questions rather than if there has been any progress and 'Always' thank them. I remember that once / twice an IRCC agent took time to go through my application (5 mins) and explain me the progress. It was an exception because most of them usually give you a standard response that they have the same info as it is on IRCC portal.
Keep faith everyone !