If it is WebDAV, DAVx5 has a feature that makes those shares available as a local volume. An sFTP app can be used to xfer files.
TrueNAS probably has a service for synchronized folders like google drive. I don't know how to access NFS or SMB transparently.
The automatic build server sometimes hangs, and it can be weeks before someone notices and kicks it. Builds, I think, are alphabetic based on device code name. I've gone for 2 months without a push on Taimen.
Rooting and using LSposed can make the process simpler. I use Andy yan's GSI on my sm-t510.