Part of it is that the attack on freedoms in Canada was much greater than most parts of the US so the motivation to do something about it was also greater. Until this very day, you need proof of vaccination to get on a flight between provinces and even to get on a train in Canada. In addition, the cross border vaccine mandates the trucks were initially really mad about are still in effect. Xiden did try to impose some mandates in the US but many got struck down very quickly. In Canada, the courts have refused to do their jobs and have not pushed back against any mandates at all. There are not checks an balances in Canada. It's open season on tyranny.

In addition, the Canadian Truckers are definitely very courageous. In a country where Marxism is the de facto religion, it takes courage to stand up to it. In the US, a protesting trucker knows he will get decent support form the public and they have some constitutional protections (those that are left). In Canada, when the convoy started, I'm sure the truckers didn't know what was going to happen. And in the end, their charter rights (Canadian version of US constitution) were trampled on, their property was attacked, and the legacy media lied about them without hesitation. However, it does seem like some Canadians did wake up and they did have descent support from at least a subset of Canadian. But not from the courts or from almost any politicians. Even most right leaning politicians that should have been on their side, didn't openly support them, but they at least didn't lie about them like BlackFaceHitler (the official name of the leader of Canada).