New Post Notices are live network-wide, the original announcement of the new post notices, has been historically locked. I understand the intention of doing so: the announcement has run its course, and new things should be posted as new questions rather than as answers to it.
However, the historical lock has an important and IMO undesired side effect: that specific lock reason also locks out the answers. Many of the answers there are still marked as status-review, and those issues can no longer be tracked. While moderators and SE staff with moderator rights can still edit and comment on them, users can no longer respond to comments or dismiss reasons on their answers. Also, this runs counter to the purpose of historical locks: these posts are not meant to be edited, they're meant to be retained in their original form as historical artifacts.
Additionally, there are new questions about the post notices popping up, that have already been asked as answers to the announcements, that are being voted as duplicates of the original announcement; while this would ordinarily make sense, this doesn't make sense if the issue it's being closed as a duplicate of is no longer trackable as an active issue.
I'd recommend removing the historical lock and either replacing it with a normal lock (which doesn't lock the answers), or just a normal closure (as is normally done with other announcements that have run their course but still have pending answers).
(Historically-locked questions also can't be flagged, and according to the FAQ on historical locks linked in the second paragraph, the proper way to draw attention to things about them is to make a meta post.)