Roku
support.roku.com › article › 115008193567Simply go to Settings > Remotes & devices > Remotes > [select your remote] > Set up remote for TV control. Note: A Roku voice remote may not be able to control volume and power on all TV models. With some TV models, you may only be able to control the volume, and not the power.
Roku
https://support.roku.com/article/115008193567Select Check remote settings to automatically set up your Roku voice remote to control the power and volume for your TV. If you prefer, you can set up your remote for TV control at any time from the Settings menu. Simply go to Settings > Remotes & devices > Remotes > [select your remote] > Set up remote for TV control.