I'm willing to change my university before coming to Canada so that everyone is sorted
I'm applying for fall universities, I already applied for the visa for fall intake but I'm looking for better universities (top-ranked)
Since now the visa application decision is in progress, I can upload the new LOA but if it gets approved with the previous LOA, can then I change it?
They usually provide the opportunity to upload new documents or update your application while it is still being processed.
If your study permit has not yet been approved, you can upload a new acceptance letter from another university into the system where you applied for your visa. It's definitely not prohibited, try it. I’m already studying and I learned the same thing as you. Of course, studying here is hard, I even sometimes pay for essay writing, I use
https://ca.edubirdie.com/pay-for-essay-writing for this. But I definitely don’t want to take it all back. Prepare all the necessary documents from the new university, because I did not have many, and because of this everything was delayed.