Heed!

If you are using Cardboard, GearVR or DayDream, upgrading to Android 11 will break DLNA and downloads folder functionality, maybe even the SLR/DeoVR app completely.

For DLNA a possible workaround is installing XBVR on your PC.
This tool makes DLNA accessible via the in-app webbrowser.
(Haven't tested myself with Android 11.)

10 months later