I'm in the UK and have a Hisense Roku TV model number R55B7120UK. I've followed the steps and added this to my Google Home app and linked the device. However I am not able to use voice commands, to change volume or pause TV. It doesn't matter what channel I am on. I understand that with Netflix this is not supported. But when issuing a voice command Google says "try using the name of the device" as if it cannot recognise the device name. Ive tried relinking and disabling/renenabling Fast TV start.
https://community.roku.com/t5/user/viewprofilepage/user-id/265142 I just bought a roku streaming stick, and voice command with google assistant works perfectly. I couldn’t make it work with a Roku Express. For you guys that have the Roku TV either Hisense or TCL, I think it’s a matter of time. What I could find out was that software needs to be 9.3 to work with Google Assistant or Alexa in UK.
Unfortunately no. You can use a third party until 9.3 is out. I believe is somewhere in August for tv’s in UK. I’ve put a link for google play in an earlier reply. But it only has about 50 voice commands/month free.