I’m not sure. If you can be a bit more specific: Which posts exactly, and why do you think those should be restored? More specifically: what exactly has changed so that they no longer violate our rules (see FAQ - Sailfish OS Forum). The post which I could find by following the hints above (i.e the one written by @peterleinchen) was originally flagged as being off-topic. The way I see it, it still is off-topic - the post did contain one word about “total buggy os xperia 10 plus”.
Not entirely. My guess is that after some time it becomes impossible for regular users to view the hidden posts. At least I could see the post I mentioned above, so it wasn’t entirely removed from the database.