Canon DSLR doesn't show icon for remote control - you probably tried using the smartphone bluetooth connection

I have an old Canon DSLR, the EOS Rebel SL2. I think this post may also apply to other Canon DLSRs. 

If your remote used to work but now it doesn't, and the camera doesn't show the icon to enable remote control, chances are that you tried using the Bluetooth feature with a smartphone. You need to find the wireless setup part of your phone settings, then find the Bluetooth setting and turn it back to Remote.

The older cameras are kind of dumb, if you enable Bluetooth for your smartphone you disable the remote functionality.

Once you're fixed the settings issue you'll see the missing remote icon.