Guys I don't understand certain things I need clarification on Mississuaga, London Office, Sydney Processing centre what does they do, I thought they receive our application from the carrier service and check completeness of the file and after that if it's complete they will transfer the files to the PA's country for further processing right, but I see people who has received AOR2 who still talk about Mississuaga, London office and so on. How do they work. Can a Ghanaian application be sent to Mississuaga for further processing.
Referring only to outland:
Sydney receives and checks for completeness. After that, would be sent to any other visa office for processing.
Before covid was more simple: files either went to Mississauga or a visa office abroad, usually (almost always) with specific regional responsibility (eg Accra for Ghana and a few other countries in the region, London a large hub for Europe and Middle East, Mexico for parts of caribbean and latin america). Some countries would always get sent to regional, some would go either to office abroad or in Canada (for criteria/reasons not clear to outsiders - probably complexity).
Now: they are sending files to different places as they attempt to speed things up - Ottawa now one option, Beijing and a few other offices in China/Asia similarly.
But bottom line: you can't influence it; and when the file is complete and passport requested, it doesn't make any difference, passport submission abroad and will get issued/printed at the respective office abroad (or Canada for those outland applicants that happen to be in Canada). [I don't know how they do for USA applicants.]