printer

The problem is most likely an outdated WiFi receiver on the Canon. Try the following to see if you can't get it to connect.

On the T-Mobile app, go to the Network tab and click the “plus” button on the bottom right. Create a new network named differently than your prime WiFi, like Canon Printer. Choose 2.4 GHz for the Frequency Band and for WPA Version choose WPA/WPA2.

Go through setup on the Canon printer and you will see this new network advertising. Try connecting to that network and you should be OK.

Full disclosure: I've owned two Canon printers and think they are terrible. I've ended up throwing both of them out and upgraded to an Epson. I haven't had a days problem with the printer since then. Also, you are one of many on the Forum who has had problems connecting Canon printers.