I think the only preview handlers for ODT files are Microsoft Office and possibly QuickViewPlus (if that still works, but it's much more expensive than Office anyway).
None of the OpenOffice developers have made any viewers since the very early versions that had a viewer for Internet Explorer (which could also be used within Opus), but that was broken and left abandoned shortly after they released it. They don't seem to have any interest in writing a viewer, even though people have been asking them to make one for many years.