Assuming your TV is supported, either of the voice remotes should work. Most TVs are supported, but if you have some obscure brand then it's possible that it's not.
https://www.roku.com/products/accessories
Many 3rd party universal remotes will also support your Roku device and TV.
Roku Community Streaming Expert
Help others find this answer and click "Accept as Solution."
If you appreciate my answer, maybe give me a Kudo.
I am not a Roku employee.