Once your application is approved, it could take another 1 or 2 weeks to finally get the PPR. That could be because they are finalizing your background check and just ensure everything is in order. It's great if you get the PPR immediately but a wait of 1 to 2 weeks isn't out of the ordinary. So I would say there is no reason to panic yet - there is every chance you will have the PPR very soon.
You could also just call IRCC and ask them the status of your application. If they say everything is good, you will have the PPR soon enough.