I also have an account in PR portal which was created when I submitted my application. I got the portal 1 on August 16. In my portal 1 reply I didn't mention I have an account in the PR portal. Today I got an automictic response message as below:
This email is to notify you that a new permanent residence confirmation case has been created under your IRCC Permanent Residence Portal account.
To view and action this case log into your IRCC Permanent Residence Portal account with your current log-in credentials.
Copy and paste this link into your browser to sign in to the PR Portal:
https://prson-srpel.apps.cic.gc.ca/en/login
For additional information on using the PR Portal to confirm your status as a permanent resident and receive your PR card, copy and paste this link into your browser:
https://www.canada.ca/en/immigration-refugees-citizenship/services/immigrate-canada/pr-confirmation-portal.html.
Can I consider it a Portal 2 email? I already logged in to my account I saw that the Permanent Residence Confirmation tab has been created with my and my dependents' information.