Since software version 4.15.12 on my HiFi Rose 150B, I am able to stream from my Synology NAS running a UPnP Audio Server ‘minim server’ with playback managed through iOS Apps ‘mConnectPalyerHD’ via my iPhone or iPad Pro.
The great thing is my previous ‘m3u’ playlists setup for this music library are now all playable to my RS150B. Library rescan of ‘minim server’ is in seconds.
NOTE: The ‘mConnectPalyerHD’ has TIDAL integration but has not yet integrated FLAC HiRes Lossless as of version 3.3.93.