Can someone tell me what the post-PPR timeline might look like?
You send in your passport, they stamp a onetime PR visa and send back the passport and CoPR to you in your prepaid envelope.
This process takes approximately one to two weeks from what I have been reading. The Canada Post strike that created backlogs is delaying delivery of mails including xpresspost. Your location might play an important role in the mailing time. Also, holiday season is coming up so it might add extra time aswell.
But once you get your passport back, I think you have two options: (1) Flagpole or (2) complete landing at your nearest visa office. Flagpole can happen the same day you get you passport back as some entry points are 24hrs but I have no idea how long does it take to schedule an appointment at a visa office for landing.
At the time of your landing, they will apply for a PR card for you which you will receive in mail after approximately 50 days. Sometimes people get request to send in new pics for PR card so that can add additional delays.