Just because it feel like it may have no been looked at, doesn’t mean it has been looked at. Sometimes moderation doesn’t removed the flag of such post if they haven’t found it to be breach. I’ve seen this a lot all over the forums, some post would remain flagged, even if reported by multiple people to be hidden.
One thing that does make it hard though for moderation is when everyone just keeps engaging with person, long after the person does report, despite multiple times people getting told to report, and don’t engage.