On lemmy.world, there is a button to initiate a cross post, but as far is I can tell, all it does is add the text “cross-posted from: <original post URL>” and put the original post body in a Markdown quotation environment (i.e. “> POST BODY”). This seems to be parsed by the UI and under some posts in Lemmy, it says “cross posted to: <community name>”.

Would following the same formatting in Kbin accomplish the same effect?