So thanks to this forum I was able to make contact with a crew member who took the iPad to YVR and thence to YYC. He was most helpful and confirmed the flight I thought it was on from YVR to YYC. We now know it’s at the domestic terminal baggage office at YYC. We’re just trying to figure out how to contact someone there. I have updated the lost item report with what I know, hopefully they’ll respond.

My many thanks to the crew member who responded to me by PM.