Thanks for posting here in the Community!
Please be advised that Voice search and voice control are currently only supported in Argentina, Brazil, Canada, Chile, Columbia, Costa Rica, El Salvador, Germany, Guatemala, Honduras, Ireland, Mexico, Nicaragua, Panama, Peru, the United Kingdom, the United States, and Uruguay. We do not have any information on when it will be accessible in India, but you can always check out our blog for the latest news and upcoming updates.
We appreciate your understanding.
All the best,
Roku Forum Moderator