No routing to internet

On VPS server (Unbuntu) or on a raspberry Pi Server, I cannot get the client to route everything to the internet via wiregaurd through my servers.

I have played with NAT rules and sysctl net.ipv4.ip_forward=1 to no avail. The clients are set to forward all packets, and indeed must be doing so as the client then loses all internet connection when wireguard is started. The server is not routing or the DNS not working.

The script is otherwise excellent. I wonder if the menu options should include
"Do you want Server's LAN access?
Server only access?
Route all traffic from client to internet via this server" and configure accordingly.

Gerry