Some of the responses i got from other users ranged from 2 weeks to 3 months.That's terrific news @SiaRia.
I am beginning to regret asking that my oath ceremony be rescheduled. It's been three weeks since I asked for the rescheduling and not a peep from IRCC. My tracker still shows I have an oath ceremony on 27 May (which of course is now passed). I'd be on exactly the same timetable as you for my certificate and passport application if I'd not been overseas that week.
On a more general note, does anyone have any insights into how long rescheduling of an oath ceremony takes, or is it just a random amount of time?
I'm on the same boat, got the oath in February, but already had a vacation booked and didn't change travel plans. Followed instructions and asked of oath to be postponed, then sent IRCC an email with boarding passes as proof of return. It has been +4 months and the only response i got was that they cannot provide timelines and i should monitor my email and wait until a new date is scheduled.