When clicking on the "RSS" button at the bottom of the forum for a particular game it opens a dialogue that says "Open in News" (on an iPhone).
If I click yes it opens the News app but I get an error and it doesn't add the feed.
I have a separate RSS reader but don't know how to manually enter the feed since the update isn't visible anywhere (it might be I'm a complete noob with this RSS stuff).
Usually, in the browser, there's an option to select your RSS reader ...
But, I've only ever set up feeds on a desktop; never on a phone (I'll read on the phone ....)