When I put automatich mode the wireguard server is OK, but no traffic is routed via the Nord-VPN openvpn client connection → not good.
When I put in customized mode I get the chance to define routing rules but honestly I have no clue what to put in there.

What I want to achieve:
Route outgoing traffic for defined devices via Nord-VPN openvpn client (like in policy mode).
Accept incoming traffic without Nord-VPN (direct with IP of ISP) for wireguard port 51820.

Configuration:
Wireguard Server: IPv4 address: 192.168.1.1/24, Listen Port: 51820, 2 profiles for IP 192.168.1.2 and 192.168.1.3
NordVPN openvpn Client: Standard definition, Client virtual-IP: 10.8.2.4, Port 1194.

Thanks!