Looks like Montreal VO started processing eCOPRs that expire in August 2024, so I guess you will receive it in a few days. Keep us updated if you get it in a couple of days pls?
You can create an account here with your information and check your eCOPR expiry date. Here you can also check updates on your application.
https://ircc-tracker-suivi.apps.cic.gc.ca/en/login