Greetings from the Roku Community, @nivaar!
We understand you wanted to connect the Soundbar with your RCA Roku TV. We'd like to assist you and provide all the help you need.
Could you please let us know what model of Soundbar you're trying to connect to your TV? Knowing what type of Soundbar you have will help us determine what workaround to use to resolve the issue.
In the meantime, you can visit this support article: How to set up your Roku TV Wireless Soundbar.
We are eagerly awaiting your response.
All the best,
Emman
Emmanuel-D.
Roku Community Moderator