I'm not sure a close reason is the right tool for this(*). Questions are closed when the signal we're trying to send is that a question is off topic or doesn't meet some site quality standard, and either needs editing to become on-topic, or just straight-up isn't a question suitable for Puzzling.
That's not the case with these questions - they're on-topic (by and large), but due to extenuating circumstances, are removed.
I do see the need, though, for some explanation on posts that are deleted and locked for reasons of moderation. I'd propose that we instead leave comments on these posts when they're removed to hopefully clear up possible confusion.
(*) There would also be a quirky technical limitation involved, which is that either the close reason is available to everyone, or we use a custom close reason each time.
...but custom close reasons just leave a comment explaining why the question was closed. So, we're back to comments.