I posted details on Synology NFS configuration last March (see below). I recall that when I first connected the Vero, it could not see any NFS share. Within the Synology share management tool, there is an option for managing the security of the NFS connection. It’s a while ago, but I think mine was set to “No mapping” and it worked with an LE Pi. With the Vero I had to change it to one of the map-to-admin options, and everything then worked. The version of LE would have been whatever was in production early in 2018.