Have a Logitech Harmony Hub or one of the remotes that comes with it? You can use Google Assistant to control it. Just say "Hey Google, ask Harmony to link my account". You'll get a pop-up on your phone asking you to allow the account link, then sign in to your Harmony account. Once linked you can use Assistant to command your Harmony Hub to take actions on the controlled devices.
"OK Google, ask Harmony to mute the TV"
"Hey Google, ask Harmony to tune channel 131"
"Hey Google, ask Harmony to start watch TV"
Among many others.
"OK Google, ask Harmony to mute the TV"
"Hey Google, ask Harmony to tune channel 131"
"Hey Google, ask Harmony to start watch TV"
Among many others.