Matthew R Kasun

the netmaker server requires a public routable ip address

Have you tried using the Do droplet as the relay instead of netmaker server? Takes docker networking out of the equation

You could use relays (pro feature).

what are the local addresses on hostB

can you post the output of `wg show` from both nodes

on host B: what is output of `ip route get 10.9.78.3`

could you post the output of journalctl -u netclient

does Alma linux 8 have wireguard kernel module?

What is output of `wg show`

Can you provide logs