Your brother got the invite, so only he can submit the application to sponsor.My brother who lives in Quebec submitted letter of intent back in 2020. We received invitation to apply in 2023.
Can I submit my information as sponsor instead of my brother. The reason is because I live in Ontario and time processing is faster.
Is it mandatory for person who submitted letter of intent to be the sponsor or it doesn't matter?
You cannot sponsor unless you also get the invitation under your name.