I have VLC 3.2.13 on my iPad Air (IOS 12.4.
, and when I installed it, it recognized my Synology NAS and its 3 shared folders - Music, Video & Photo. I have since expanded the storage on the NAS, and I had to split the music files over 2 volumes, so now I have 2 shared folders for music - Music and Music 2. VLC does not see Music 2, only Music, which now contains only half the music files. I have tried rebooting the NAS and restarting the iPad, to no avail.