Welcome and thank you for posting here in the Roku Community, @Akekal!
Thanks for informing us about the issues you've encountered in being unable to stream your local channels through your Paramount Plus subscription. We'd be happy to share further information about this.
Have you tried accessing the Live TV section within The Roku Channel? Try navigating to the left-hand side menu of The Roku Channel and selecting Live TV. With Live TV, you can view both the Local News section as well as the Live TV Channel Guide.
Furthermore, this website may help you learn more about this: Why am I unable to get my live local CBS station?
We hope this helps!
Warm regards,
Carly
Carly Y.
Roku Community Moderator