You can find it here:
https://ircc-tracker-suivi.apps.cic.gc.ca/en/register.
Some people encounter some issues when they sign up. All information have to be similar as your passport, and be careful to not add blank spaces. One thing important to notice, the
tracker isn't 100% reliable at all. It seems to be updated everyday around 11 AM (EST) even it's written that the current last update is 20th of March.
Some people have "in progress" status, on the tracker, even they have already received their approval letter. Or some people don't have the same status on GC and on Tracker. (my case).