I am pretty sure the progress bar will show fully completed for approved applications. Just read the definition of Six month timelines-
The Express Entry six-month processing standard begins when an application is assessed as complete and is promoted in the Global Case Management System (GCMS). It ends when Immigration, Refugees and Citizenship Canada (IRCC) makes a final decision on the application.
So the processing time is already ended for the approved files. It is done when a decision is made not when ppr is sent! Though 90% of us (approved applicants) didn't receive the passport request mail after six months from AOR but IRCC will proudly say "we have processed 80% of the applications within six months". What an eyewash IRCC