Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
Re: Universal watch list to automatically update with all of your service accounts
No, that would be a form of content aggregation: Among other things, it would require you to provide all your login credentials to Roku/give them access to your individual streaming service profile/settings, or that the services would otherwise provide your watchlist to Roku, and that isnt something Roku is heavily involved in (for now/yet).
(Thats something one would expect from/for Google, which is heavily invested/involved with content aggregation on its Android TV/Google TV platform)
For now, you have to use each services built-in watchlist functionality for that, and or keep your own master watchlist somewhere/somehow.