It no longer supports any region outside the continent and cannot be deleted either
The Roku-compatible version of the Weather Channel app is created, provided to Roku, and maintained by The Weather Channel. Roku just provides the platform on which it is run.
Questions or complaints about the features of the app should be directed to The Weather Channel.
Weather Channel contact page: https://support.weather.com/s/contactsupport?language=en_US
I at the very least would like to be able to delete the **bleep** useless thing but can't do that either nor should I have to ask a 3rd party how to delete their **bleep** app to begin with.