Canadian film channel

You seem to be misunderstanding Telus's role. They are a service provider, not a broadcaster. The CRTC is who controls Cancon, and it's requirements are specific to certain classes of channels. Broadcasters that fall under those certain categories need a certain portion of what they air as Cancon. Specialty channels are often exempt from Cancon requirements. Think: HBO, Movie Channels, etc. Broadcasters are the ones that have to get broadcast rights for the shows they air in Canada on their channels.

Most of those show specific streaming "channels" that you see are related to one of the specialty channels. For example the game show specific ones are from the Game Show Network. Most of these streaming channels appear to be streams from Tubi (owned by Fox) or PlutoTV (owned by Paramount). Between the two of those, they control a long list of channels and content and only some of it is in the guide. That includes all of the examples you provided. (Three's Company, Walking Dead, Price is Right) The streaming channels are exempt from Cancon rules. PlutoTV at least does have a few Canadian specific content options but not the main channels as they wouldn't have broadcast rights to them. The only advantage to having those channels in the guide is that users don't need to get either of those two streaming apps to view the shows and it gives people more content options than the existing actual channels. The show specific streaming channels are also only available on the newer TelusTV+ hardware. Not the older Optik TV boxes.