For clarity sake, let me explain Gemini is still active for Canada. It is Brave that is preventing Users from linking browsers to it.
As to when Brave will allow new connections again, we don’t have an official date. They have been saying the goal is to have most workable countries working again by the end of this year. That, however, is not solidified and anything can happen to delay things.
The official page they update to show supported regions for linking to a custodial partner is https://support.brave.com/hc/en-us/articles/6539887971469
Then I have a topic on this site that I regularly update to let everyone know the latest from Brave in regards to countries being added again. So if you wish, you could try to check in on PSA: Unsupported Region every once in a while and you should see any new announcements there.