No, there's no workaround. Many providers are only available if you have some sort of TV provider. Historically that meant either cable or satellite TV. However, there are now several streaming providers that can be your "TV provider". Some examples are Fubo TV, YouTube TV and Sling TV. There might be others, but these are the three largest that serve the US market.
Dan
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, just another user.