Nothing additional was setup unless its part of the default install from Apple and I don’t recall enabling anything in particular for MacOS via truenas. I am going to safe this is safe to ignore going forward?
It means precisely what it says.
The macOS “previous versions” feature won’t work. I think it may require APFS, but maybe it could work on the SMB if the right features were enabled.
You can get previous versions via the zfs snapshots instead.