Unless the cable box has Alexa compatibility you won’t be able to control those channels. The box is what does the scanning, not the tv, especially when connected with hdmi.
I am a Best Buy Employee, but the views that I post are my own and not that of Best Buy.
***Know that I am not able to issue official responses and that my posts are only here to help before an official response is offered by a Best Buy Social Media Specialist***
