Sometimes a dealer might know a timetable, so it couldn't hurt to check. They get announcements every once and a while when certain accessories will become available. If they don't know then nobody really does. Good luck with dealers, though.
I'll give you the answer my FAD has given every time I've asked........"Hopefully, soon". Same on 4d rock sliders, Bestop tops, winch bumper, ARB tire inflation kits, tube doors, etc.....
Ford gives them the same amount of timely info as they've done with Bronco reservation/order holders. My FAD is eager to get product but it's either being controlled by Ford or the supplier making the specific item for them.