Hello,
At the moment is not possible to add routes in your intended way. This functionality is planned to be included in the future, however, no target firmware is set yet, thus, routes have to be included in the OVPN configuration for now.
You could also try adding a routes via SSH with a following command:
- ip route add <network_IP/mask> via <next_hop_IP> dev <OVPN_Interface>
You can filter you VPN interface name with the previously mentioned ifconfig command or using the one below:
- uci get openvpn.@openvpn[0].dev
Best regards,