I’m assuming that you have had a look at the RSS Import doc at:
https://codex.www.ads-software.com/Importing_Content#Importing_from_an_RSS_feed
also, check out this post:
https://www.ads-software.com/support/topic/49788?replies=12
in it allyn shows a little about the structure of an RSS file. But, there is no discussion of post STATUS
At the bottom of that post, Kafkaesqui placed a link to
https://www.ads-software.com/support/topic/37854?replies=8
where he discussed the MT import process which does include a STATUS field and is fairly straightforward text input. I used this method to load up some off-line content and it worked like a charm.
It should be fairly easy to convert the RSS feed to this MT format with the text editor of your choice.