There is no time frame to reply IRCC for PR approval mail that's what IRCC agent told me as I was in similar situation.Hi All,
I received the PR approval letter via email yesterday. I'm still in Canada but have booked a flight to travel to India next week. I'll be coming back in the first week of April 2023. Can anyone please tell me how long can we wait before replying to that email and creating an account on the PR portal? Also, will my TRV become invalid once I receive my COPR if I am in Canada?
You can reply next week once you reach India saying you are outside the country and give them the date of your return.
This way they will wait for you, your TRV remains valid and provide you next steps(PR portal credentials) once you are back in Canada.