I think this should be in the Daz Studio forum.

Lost and Found is a catch-all category, not a location on disc. The Daz Studio Formats and Poser Formats top-level containers should ahve the fiels as located on disc - aside from the Daz Connect container, which is a virtual composite of the folders under /data/cloud for content installed through Daz Studio. Is the content correctly present under the Formats locations, just lacking categories, or is it actually missing or failing to load from there?