TV Channel/Volume trigger IFTTT

Is it possible to change channels on or set the volume webos tv.

I know its possible to do source inputs as I have IFTTT setup so I can say switch to plex and it will change to the plex app.

On the panel in HA there are 3 buttons for the volume (mute,up,down). How would I access these in IFTTT with the Google Assistant.

I also want to be able to say “put channel 1 on” or use the channel name “change to BBC2” and have the TV change to that channel.

Im using this -

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Bump on this thread. I would like to be able to change source to Amazon and play a video or music from prime via Google assistant