I use Volumio on a Raspberry Pi with a DAC HAT. The analog output goes to a whole-house distribution system. I installed the Volusonic plugin and it connects to my Navidrome server hosting the music collection. In this configuration, Volumio functions as a control plane. I do everything else (playlists, etc) from the Navidrome web interface. As a bonus, there are several Subsonic apps that work with Navidrome for mobile listening.
I tried Jellyfin, but never got it working the way I wanted. DLNA was particularly difficult. It would play two songs, then stop. I wrote it off as user error out of frustration, and moved to Navidrome. It’s been working well for me, so perhaps it’s worth trying since you already have Volumio up and running.
Note: The prominent comment at the Volusonic link claiming the plugin doesn’t work with Navidrome is over two years old and resolved. Don’t let that dissuade you from trying the plugin.