Streamer or Server that has playlist capability.

What streamer or device has a roon core that also allows you to use playlists? I purchased two streamers and neither one does playlists created from Flac I have on a Freenas. No playlist functionality.  You can only play one or all items in the SAME directory.  You can shuffle/repeat from the SAME directory. There's no way to make a playlist from album "A" followed by two from "B", one from "C", etc.  It's one or all from "A" and then navigate manually to "B" or "C", etc.  As much flexibility as playing individual CDs all stored on a disk.
How would it work if I was using a Trinnov routing to the amps?
Does anyone know if a streamer or server has a subwoofer out?