What Canada can do is engage in the preliminary discussions that are part of the accession process.
Right now my understanding is that applicants are encouraged, before the formal accession process begins, to have informal talks with all the current members. My understanding is that Taiwan has been unable to do that, because the response has always been, “Well, there is no consensus.”
In fact, there is no requirement for consensus for individual countries to begin these informal consultations. That is certainly one thing that Canada and other countries could do.