Problem mounting NFS shares from OSX servers

I am having a problem using NFS connecting to shares **from** a Mac with Catalina and another one with Snow Leopard (don't ask why ;). I just updated to BigSur 11.4 When I use : -fstype=nfs,noowners,nolockd,noresvport,hard,bg,intr,rw,tcp,nfc in /etc/auto_nfs

cd /System/Volumes/Data/NetVolumes/data
-bash: cd: /System/Volumes/Data/NetVolumes/data: Invalid argument

if by other hand I use -fstype=nfs,rw,sync

cd /System/Volumes/Data/NetVolumes/data1
-bash: cd: /System/Volumes/Data/NetVolumes/data1: RPC prog. not avail