Thanks for letting us know! @Reccepilot
There are several reasons why the HDMI ARC might not work; the issue could be with the ports, HDMI arc cable, or the Roku device itself. Have you tried replacing the HDMI cable or using different HDMI ARC ports? Let me know so we can explore other troubleshooting steps that might help resolve the issue. Check out this link for some extra help with getting your Roku Streambar set up.
Looking forward to your update!
The Roku Community Team
Haz M.
Roku Community Moderator