Very few subscriptions include Warner Media networks (TNT, CNN, TBS, etc.) for TVE access. I know regular DirecTV logins work for those, as did my Spectrum, but few others do.
Locals aren't really well supported, except for NBC, Fox and ABC, but only in larger metropolitan market areas. CBS won't work, because they require a separate/additional CBS All Access login for streaming.
Just because a channel is part of your cable/OTT subscription, it doesn't mean that your provider also includes TVE access.
Also, A+E networks (A&E, History, etc.) don't offer live/linear programming streams, so they aren't available within Channels.