How can I see my NFS share in any file manager on Android 6.0.1? I mounted my NFS shares successfully in Termux with busybox. I mounted the network folder to /data/media/0/Music. 

I'm also able to see the content of the network share in the terminal with ls -l /data/media/0/Music. But when I click the location in my file manager the location is empty. I tried different file managers as well but all display nothing. 

Is is a permission issue? What do I have to change in Android to make it work?
Turns out an option in SuperSU blocked me from seeing the content of my mounts. I needed to disable the "Mount namespace separation" option in SuperSU app. Only then the mounts will be visible to other apps! Disabling namespace separation may cause security flaws, but I don't see any other solution yet. Reboot the device, mount your shares and everything will be as expected.

Found the solution here: https://stackoverflow.com/a/33611664