Ah ok. Here in the U.S. such things are handled by snail mail. You can create an account on the USCIS portal to get updates there. When there is an update, an email is sent to you stating there is an update in your case and that you will need to log into the portal to see the update.

In that portal they then state that document XYZ has been mailed to you and if you did not receive if by ABC date then request another copy be mailed to you. You need that physical document to do anything. You cannot download it from the portal because it isn't in the portal.

I like it this way for the added security. Someone gaining access to my email can't see anything related to my immigration status. Two factor authentication is also required for the portal login.