This wait is making me anxious. But my application just got finalized and approved on May 31st. I thought the tracking number for the return envelope would be activated today. But looks like it can take days (even weeks and months!) for activation to happen and for the return of the passport. So I guess I'll wait until this week. Thanks for sharing!
Here's my timeline. Feel free to ask me anything if you need help.
Application type: Express Entry (online), CEC, inland
Express Entry profile created: January 18, 2019
Invitation to apply: January 23, 2019 (5 days since profile was created)
Application submitted: March 12, 2019
Medical exam passed: April 27, 2019
Passport request: May 21, 2019 (10 weeks since submission)
Passport sent to IRCC: May 21, 2019
Passport received by IRCC: May 23, 2019
Application finalized and approved: May 31, 2019 (8 days since receipt of passport; 11.5 weeks since submission)
Passport return tracking number activated: pending
Passport and COPR received: pending
Travel to the US: pending
Landed: pending
PR card: pending