Have not yet received my dining plan refund yet.
BUT, when I called to check on the timing of that (knowing full well they likely would not know), the message at the start of the call did say that they can now modify reservations with arrival dates starting today (6/5) through 6/21. After hearing that I stayed on the line to see if there was any Disney magic that could happen with my trip.
There was not, as she got the notification of the availability of modifications literally in the middle of our call. So things are still coming in to them at random times...
Anyway, unfortunately still a lot of non-answers but thought this info might be helpful to some...
ETA: I was able to order my magic bands today...