Email comes the following day, so probably tomorrow in your case.My application was just approved today! Haven’t reveived any messages/emails from them though.
I also don’t have the tracking number of the prepaid envelope I sent to them in the package(I was foolish and forgot to take a picture). Should I be expecting it in the mail sometime next week? Or will there be another notification on the account with a tracking number?
NO notifications on cic account after this till you land and get your PR card. I don't know which mail company you used but you can always find tracking number on the billing receipt . Yes it usually gets delivered within a week after approval.