Thank you for joining us here in the Roku Community, @banks2713!
We appreciate you reaching out for support about controlling your Samsung TV's power and volume using your Roku remote. We'd be happy to suggest some steps to help you set it up.
Please try navigating to your Home screen. Scroll up or down to select Settings > Remotes & devices > Voice Remote > Set up remote for TV control > CEC setup. You may refer to our support article dedicated to this: How to set up your Roku voice remote to control your TV
If you encounter any issues during setup, there are a number of suggestions for you to try by visiting our support article here: Why is my Roku voice remote not controlling power and volume on my TV?
We hope you find this information helpful and if you need further clarification and assistance, please don't hesitate to reach out.
Best regards,
Carly
Carly Y.
Roku Community Moderator