Sorry the SonoreUPnP is your friend here.
It behaves as a Roon Endpoint, running as a Squeezebox service, but bit perfect output to a UPnP render without format conversion.
Now used exclusive as input to my Naim NDS Network player, with output as either WAV for PCM (flac, alac etc) or native DSD64 for dsf files.
I now have it running on an UltraRendu with UpTone UltraCap LPS power supply with the latest SonicorbiterOS 2.6 (most important, it was a bust with the earlier OS versions).
Recommended.