Hello Yar and thank you for your reply.
Seems that DeoVR lacks of compatibility with the Serviio and SimpleDLNA DLNA servers (but is perfectly working with other DLNA servers).
I had only the opportunity to test Serviio DLNA server and I unfortunately can't see any file inside the DLNA folders.
I'm able to play contents served by Serviio with every other DLNA client, including other VR players on the Quest. But I really want to make DeoVR working too. We just have to understand what DeoVR doesn't like listing the files in the DLNA folders when accessing these DLNA servers.
I don't want to switch to another DLNA server such as Windows media server because I already have Serviio running on my network for years. I don't have dubts that it will work with Windows Media Player and I'm not complaining that the DLNA support in DeoVR isn't working with every DLNA server out there. I'm only trying to reporting that isn't working with this two particular DLNA servers and I ask you help to debug myself or maybe ask you to reproduce and fix the issue (I'm not the only one who reported the issue, you know).