do you think we could have channels like USA added as a subscription? I recently had my cable turned off (except the internet) so now I am just watching the Roku Channel and my subs. Would like to have USA because there are programs I miss seeing and can't find them anywhere else.
That would be up to USA and the other "cable" channels and they may have contracts with the big cable companies that preclude them from offering subscriptions. There are streaming providers that may have that channel as part of a package. They only require Internet service, but they're becoming more and more like cable companies, so everything you disliked about your cable company you may dislike about them.
This is an old article, but it's still relevant:
6 cable alternatives and live TV streaming services (2022)
Some cable network content is often available through related streaming services. USA, owned by Comcast, would be Peacock. You won't get any live feed. That would require something like YouTube TV or similar streaming cable service.
You can also use web sites/apps like JustWatch or ReelGood to see if any shows are available on free or paid services and keep track of what you watch.