Although I've found one area that Lemmy to kbin doesn't seem to work when bringing in older content when a new vote is done.
Instance: StarTrek.website Lemmy. comment thread: https://startrek.website/comment/2051539
The copy on kbin.social does not seem to load the thread that starts with user @jet
https://kbin.social/m/[email protected]/t/404007/Favorite-sci-fi-film-thats-not-Star-Trek/oldest
Not sure what is going on under the hood where those won't copy into kbin.