I’ve been browsing through the zfs,zfs-destroy,zfs-snapshot man pages, and haven’t been able to figure out how to tell if these folders are in fact snapshots, or something else.
I don’t see anything under snapshots,replication,cron in the web UI which would make these appear…
OK, I still don’t know what’s going on but I believe I’ve found the root cause.
I noticed the auto-generated directories only have two (empty) folders within, and those two datasets are the only ones inside of jail-share which are unencrypted as a side effect from upgrading Core to Scale. I’m going to backup, delete, and recreate those two datasets.