Of course, Quora doesn’t have a publicly visible ticketing system, so we can’t tell if an appeal has been ignored, or not updated. The case OP refers to, where a collapsed answer has been edited, could be such a case. My own experience is that when I’ve edited the answer it was promptly uncollapsed, but that may well be luck.
The formal appeal avenues are in Quora’s answer to How do I appeal a Quora Moderation decision? I would suggest that if the collapsed answer Appeal link is no longer available, because you’ve actioned the request, but the answer is still collapsed, that you use the generic appeal avenue—go to the contact form, specify the URL of the page, and give the details that the answer has been edited to conform but is still collapsed. Give them a few days beforehand.