Channel apps on Roku - TWC TV and Apps

I love using the channels apps on Roku because you can watch many years worth of series. For example A&E lets me see 62 different series with all the episodes of programs that were on that channel at some time. FXNOW lets me watch all episodes of the Simpsons. My complaint is that for some reason AMC and FREEFORM will not let you sign up if your a Spectrum Time Warner customer. All other cable systems including other Spectrum customers can.

This question is about "Channel apps on Roku", with Time Warner Cable TV and apps.