Happy to see this thread. We don't have Nexus but freq get TSA Pre Check on our boarding tickets. Departing from YVR is there a separate pre check security line?
When I asked last trip they just said oh, that's just for the US, not Canada. Then why is it on my Canadian ticket leaving Canada?
It's also been on my ticket leaving Geneva, Jakarta, and Accra (and others). They are correct, it is TSA Pre Check, so only works for TSA, not CATSA (and whatever those other countries have). There is a NEXUS line at most Canadian airport, but I don't remember if YVR is one of them (they definitely have NEXUS lines for the customs/immigration part, just don't remember about the security line. Moot point for you as you don't have NEXUS anyway (and I've generally had to show my NEXUS card to access the line at airports that have them where they aren't fed directly from the NEXUS immigration/customs section.