I'm not familiar with Canada regulations so I can't help you there.
What are the "Outdoor" channels in Canada? Also, what are the "Indoor" channels? I knew US and EU had different laws but didn't know Canada was also different.
Since it is connected to Ch 48 for me right now I guess that may mean Ch 48 is an "Outdoor" channel in Canada and not allowed??
If it helps I currently have 2 AP's using 5G:
Ch 48 is the one it is currently connected to. Camera has been mounted outside my garage close to a year now.
Ch 157 is the one near my office used for bench testing and it will connect to that as well if I bring down the AP with Ch 48.
According to my AP controller, the signal is -82dBm (which is a VERY weak signal). According the camera Web GUI (this pic you posted), it's signal is 3 out of 5 bars which I would think would be like 1 bar based on the AP. Back to the AP, it seems to go between 80-82 dBm and I am always surprised it doesn't switch to the 2.4G. When I brought down the 5G radio, and it was using 2.4G, the signal is much better but I can't remember what (I want to say 50-60 dBm). Like I said, it must be coded to prefer 5G.
FYI - When testing I always used the same SSID so I would never have to touch the camera. I just changed things on the network side. I use the mobile app for this camera and resetting the App/camera is a pain so that is why once that is set I don't touch it if I don't have to. I also try to not to mess with the Web GUI too much since sometimes it messes things up. In other words, if the setting can be changed in the Mobile App I do it there. That is just my experience though (YMMV).
Eventually I want to put a dedicated AP closer in the garage but that project keeps getting pushed down list of priorities. If do, I can try other channels and report back here.
One last thing, I had 2 apps on my iPhone that I used for testing Wifi outside. First is a very old app by Apple call Airport Utility (not even sure if you can get it anymore. I used that first to see what SSIDs I see and the signal they were getting at that location (to see if I can even see my SSID or not). If I could find the SSID, I would connect to it and then use a 2nd app called Wi-Fi Sweetspots. That would tell my throughput in MBps in realtime. Since it is realtime you can move and around and see if it goes up or down in case there is something that might interfere (like aluminum duct work in a wall). As you can see from my comments above, quality of signal is different from manufacturer so this would help me see if I can "really" get the throughput I need.