How do we find out the cause of deleted posts not shown in the modlog?
I'm just going through my past history, and looking for anything where the subject is "*Permanently Deleted*" and where the Modlog for that community shows nothing.
Deleted means that the creator deleted it, which won't be logged to the modlog.
Removed means a moderator or admin removed it, which will be logged to the modlog.
It could also be that the user was instance/community banned with the purge content option enabled. Which might confuse you, because the posts won't have a modlog entry regarding their removal. The purge content option's status is not logged along with their ban. So be sure to check if they are instance/community banned as well.