I looked into this a while ago and was surprised to find that no file explorer on Android seems to support it[1]. However, I did notice that VLC for Android does support it, though unfortunately only NFSv3. I was at least able to watch some videos from the share with it, but it would be nice to have general access to the share on Android.

[1] Of course, I didn’t test every single app — there’s a bucketload of them on Google Play and elsewhere…

Yes ! they are using a a client library for that https://github.com/sahlberg/libnfs

Interesting, the readme for that library says that NFSv4 is supported. So that likely means that VLC is doing something wrong on their side, because only NFSv3 works?

Been a while, but if you root your phone and have access to the kernel source in order to build the NFS modules, would you be able to mount NFS shares then?

Yes, you need a rooted phone since usually support is at the kernel level

Nice, glad it's still an option