Yes, there is protection in the Canada Labour Code, which contains a provision on technological changes.
However, this provision dates back to the time when you could knock a hole in a factory wall to bring in a machine. You could see it coming, which is no longer the case. Employers get around this provision by using voluntary departure offers rather than layoffs. It kind of goes unnoticed.
AI is harder to see. It shows up on a computer and you don't see it coming. In many cases, everything is already set up and deployed before the union gets wind of it, so it's hard to have a conversation about how we're going to do the work with AI.
There are also risks to workers' mental health. We would like to have these conversations to keep the work interesting and use AI as a tool to improve our work, but that's not what's happening right now.