On or near the Channels Support - TV Everywhere Availability (getchannels.com) support page, could you add a way to pick a channel and get a list of the providers that support it via TVE?
That would be probably be a lot of effort to maintain. There is a spreadsheet at https://thestreamable.com/tv-everywhere-apps that I used when trying to decide that covers the major Live TV streaming providers.
It would essentially be a different view of the same data that powers the by-provider view.
Also, the chart on The Streamable is not very up-to-date.
For a reason.