I personally haven't done it (our customers are not interested in their kids yelling at Alexa or Google all day) but I don't see the need for it. The amount of time it takes to tell Alexa or Google to go to a channel (and it not recognizing it) and doing it again you can easily enter the channel number in or even better use the TV Preset logic.

If you haven't looked into the TV Preset logic definatley something to look into and get familiar with. You set it up using the users zip code and select the service/s they are using and it provides a live guide on all Crestron devices that are using this. You can set multiple users/profiles so the MR and MRS have their own profiles.