I have a very similar complaint / concern — it seems that the review thread is simply dead — no one answers, nothing happens. I am on rejection #4 dated 13 Oct and have been posting and waiting for feedback but 8 days on nothing. Why go to the time and trouble and cost of buidling an app if it simply can never move forwards because the ecosystem is broken.

I am still waiting for a reply anywhere — this is insanity

You're lucky. Try a month

I submitted my app under Apple ID 1043931945|1 on September 17th — it is now October 18th !!! First was a 2.1 rejection for more detail required, which I understand is almost a mandatory reply for a new developer. That was followed by a request to see the paywall after free trial expired. This was followed by a request to add a link to the EULA policy to the paywall. My latest rejection, #4 on October 13th, is for a screen the reviewer said they could not move beyond, when there is a clear text that states "tap here when done", so I sent a video walking through every page of the app and showing its full and 100% functionality. No reply from help desk, no reply from thread in app review, no reply from review appeal and no reply from expedite! Prepare to be stuck for a while!