Hi,
welcome to NethServer Community!
You could create HTTP routes on the Leader Node to the worker nodes Wireguard VPN IPs.
I tested it with the webserver app on a 3 node cluster, 1 worker node at home.
On the leader node I set following http route:
The Host has to match the app hostname on the worker.
You’ll find the wireguard VPN IPs on the Nodes details pages. On CLI you could use:
ip a s dev wg0