I would expect the border restrictions will be in place well into 2022. There won't be any "vaccine passports". In fact travel will get more restrictive.
The new summer variant mutation the scientist(?) discover "might possibly" be 10x more deadly.
To my Canadian friends, if you want to come to Mexico, come now. If you want to go to Canada, pay the price your government charges you and go now. Pretty soon you won't be able to.
Canadians, if you stuck and have a RV or car in Mexico, can't cross the USA border, I can legally drive your RV/car or haul your trailer north.