How to share one folder with multiple drives?

I’ve modified this commands that did work before, to share /mnt/ instead of /mnt/hdd1.

It didn’t work.

$c: client, $s: server
$s sudo chmod 777 /mnt
$s sudo vi /etc/exports
/mnt  192.168.1.45/24(rw,sync,no_subtree_check)
$s sudo exportfs -arv
$s sudo systemctl enable --now nfs-server.service

$c sudo systemctl enable --now nfs-client.target
$c showmount -e 192.168.1.45
Export list for 192.168.1.45:
/mnt 192.168.1.45/24
$c sudo mkdir -p /srv/nfs/lenovo
$c sudo chmod 755 /srv/nfs/lenovo
$c sudo cat /etc/fstab
192.168.1.45:/mnt   /srv/nfs/lenovo  nfs auto,x-systemd.automount,x-systemd.device-timeout=10,timeo=14,x-systemd.idle-timeout=1min 0 0
$c sudo systemctl daemon-reload
$c sudo mount -a
$c ls -l /srv/nfs/lenovo
drwxr-xr-x 2 root root 4096 sep 24 12:57 hdd1
drwxrwxrwx 2 root root 4096 ago 28 17:19 v
$c ls -l /srv/nfs/lenovo/hdd1
total 0

The drive isn’t empty.