Welcome, and thank you for posting here in the Roku Community, jimrk!
Thanks for reaching out and informing us about your concern in accessing the WNBA directly. We'd be happy to share further information about this.
It seems like the WNBA has changed its policies and now requires a TV provider for streaming. In this case, we highly suggest directly coordinating this with the channel provider for further clarification as they manage and maintain their app on the Roku streaming platform independently.
You may reach them here: WNBA Support
We hope you find this information helpful.
Best regards,
Carly