When you applied did you receive a letter like this? Yes/ No
This confirms that your application has been received by Immigration, Refugees and Citizenship Canada (IRCC) on Date you applied (yyyy/mm/dd).
Please attach this letter to your present work permit Number xxxxx as proof that you are authorized to continue working with the same conditions (ie: employer and occupation) until Date or until a decision is made on your application, whichever is first. This extended period of work is authorized as per subsection 186(u) of the Immigration and Refugee Protection Regulations. If you leave Canada before a decision is made on your application, you will no longer be authorized to continue working.
If yes please list the the date. Also under your account of IRCC you can check if it was approved or not if it says canceled probably the did not approve it because your PR was already approved.