In Aug 23rd a blog post has been published introducing liveFeed in Direct Publisher.
https://blog.roku.com/developer/direct- ... r-livefeed

I tried the instruction and it didn't work for me. It makes a page (just like movies) and my live stream (tested)  is not selectable.
has anyone tried this one?

Did you specify a validity date span?  I'm not sure that would cause your problem, but, I believe it controls when a live stream is active.