Since version:1.2.14 TT-RSS has support for publishing selected articles
in a special RSS feed, accessible to anyone who knows the special
randomly-generated URL. This works independently of GeneratedFeeds.
You can mark articles as published by clicking standard feed
icon near headline title:
You can learn your publishing URL to share it with your acquaintances or
generate another URL if necessary on My Feeds tab in preferences.
You can also use filter action “Publish article” to publish articles