How to integrate an Atom Feed?

Description

Need to add an atom feed xml into Rocket Chat room. How would that be done?
Searching Rocket Chat Docs finds nothing on “Atom Feed”: https://docs.rocket.chat/?q=atom%20feed
Same question for RSS

There was an open feature request which was closed without comment: https://github.com/RocketChat/Rocket.Chat/issues/878

Should the issue be re-opened as it seems atom or rss feeds still can not easily be added to a room in Rocket Chat.