China uses different software for all vehicles that are foreign and sold in China last I knew. There is no reason that companies couldn’t submit open source firmware (or at least open to review for the government) to Canada’s government for alteration and approval for shipping. Then if any car sold with alternative firmware would result in massive fines and ban of all future sales. Poof. Your trembling fears of people trying to help the less fortunate should be gone. All the sudden car prices come down in your country, as does gas prices, meaning if you want to keep your gas vehicle, you get cheaper fuel. The supply didn’t change, just had lower demand with every electric car sold.

Also your dependency on a country who is threatening your well being goes down, that should be a win win