[Cisco2kid]

My work around for that is to sort my list by Play Count - Ascending. This will sort with unplayed items at the top and played items at the bottom of the list

Moved to music.

Ahhh.... but as I said, that is an option in Smart Playlists (or somewhere).  It is not available on my Rpi4 and latest Kodi anyway.... cannot sort by that option.  And using a library is just too many hours to build... and when the library is so big, it doesn't seem to export and import well.... so each upgrade seems to demand total rebuild over several days.  I just as well leave it.... and some of my files are not tagged properly.... way to many to retag.
Thanks for brain storming though.