I'm hoping (if not hopeful) that iOS 15 brings the traffic/accident/police reporting features to Canada. I can't imagine why there would be a delay in rolling them out here given Google Maps has had those features in Canada for years now. There is certainly no legal impediment.
I think they are just making sure they not only work as planned, but that they can track them by user if needed (new Maps profile)….and I don’t mean “track” as seeing what you are doing, but noting that one user may be posting 100’s of incidents while other users say only 50% of those are real.
We’ve had the ability to submit them since early February but have yet to actually see the user submitted ones in action. Guessing that may come as early as the public beta or shortly thereafter.
And you are correct, there doesn’t seem to be an issue with implementing this in other countries. The only exception right now is China where the speed trap report is replaced with construction I think.