Doesn’t support it directly, I can’t add opus files to the iTunes library, so I had to use VLC for them, but it’s not designed to be a music player for the iPhone and the music stops after playing a couple of songs with the screen off
Please read the linked article at the end, from someone who lived at that time it brings great memories of the console wars: https://arstechnica.com/gadgets/2013/01/how-i-launched-3-consoles-and-found-true-love-at-babbages-store-no-9/
Cinecalidad is a great place for high quality rips, latin American spanish