I think there may have been a misunderstanding
I wasn't asking how long it takes to receive a reply from support. My question was specifically about how long a dev log post can remain in the "Waiting for approval" state before it is reviewed. Those seem like two different things to me. One is about support response times, while the other is about moderation of a dev log awaiting approval.
I do appreciate the explanation that approval times can vary significantly and that some posts may be held for manual review if they're flagged. That answers the question I was originally trying to ask.