I am not sure but try to use some logic here although according to my experience, we should not expect anything logical from IRCC.
They introduced E-copr after the pandemic for inland applicants to save them not landing again. Now, if you are outside then you need to land within a known period of time (similar to outland applicants). I think within six months. Outland applicants require a visa to enter. So, they send their passports to their embassies to receive a temporary visa for landing in Canada. Since you already have it, it might be easier than you think. Again, I am not sure!
So, if you are outside and receive a decision-made status, you will eventually share your address via the portal. I have not received the portal I am just speculating. Now, the question is what happens when you use an overseas address?
I would talk to a lawyer or IRCC if it can't wait.