How to share the whole zpool (including child filesystems) via nfs?

Using the belowzfs filesystems:

NAME USED AVAIL REFER MOUNTPOINT backup 7.22T 6.83T 3.94T /backup backup/compressed 3.28T 6.83T 3.28T /backup/compressed

When backup is shared directly using nfs-kernel-server , it's contents are available from nfs-clients. Unfortunately the 'compressed folder' ( backup/compressed ) shows up however it's contents does not.

If backup/compressed is shared using sudo zfs set sharenfs=on backup/compressed or nfs-kernel-server , the folder is still inaccessible.

I have confirmed that both filesystems have been shared:

showmount -e Export list for node1: /backup/compressed * /backup *

How to share the zfs filesystem and it's child filesystems using nfs?

Update:

cat /proc/fs/nfsd/exports returns: