Linux

I believe systemd after targets work tho I have never tried them Try adding this to mount options

x-systemd.after=network-online.target

You may be right, but I worked around this using https://wiki.archlinux.org/title/NetworkManager#Network_services_with_NetworkManager_dispatcher

I added the CIFS shares to my fstab with the _netdev option and created /etc/NetworkManager/dispatcher.d/30-nas-shares.sh containing (got the WiFi UUID using nmcli con show):

#!/bin/sh
WANTED_CON_UUID="UUID-OF-MY-WIFI"

if [ "$CONNECTION_UUID" = "$WANTED_CON_UUID" ]; then
  case "$2" in
    "up"|"vpn-up")
      mount -a -t cifs
      ;;
  esac
fi

This waits for my WiFi to come up, ensures it's my home WiFi, and then mounts my shares.

There are probably other and better ways to do it, but it works.

Try adding the nofail and _netdev options in your fstab entry. I have this on a few computers that connect to nfs shares including my laptop that obviously can only connect when I'm at home or on VPN. Example:

server:/path /mnt/path nfs4 defaults,nofail,_netdev 0 0