Working on it. Details:
One of the good things about vBulletin was that every thread and every post had its own unique URL. We used that in order to move stuff over and fully redirect everything. We have a database of all reply posts that were marked as the answer (the green check mark) either by the original poster, and MVP, or a Moderator. We have to get that information moved over asap. Until then it's not even possible for us to manually mark them one-off unfortunately.