If I do in CLI unhide full it shows me the interfaces list.
But I also want to have a similar option for the NetConf queries.
Is it feasible or I should use AAA to permit/restrict access to the nodes via NetConf?
Unhiding a tailf:hidden full statement is not supported. The reason is that you would confuse machine-to-machine communication clients like a NETCONF or RESTCONF client. How would they understand that you did an unhide and there is now all of a sudden more configuration available? For such clients, the client and server agree on one or more YANG models that they map to the NETCONF/RESTCONF protocol. tailf:hidden is intended to serve human-to-machine interfaces.