2 open vpn with port forwarding


is there a guide how to set up 2 vpns at the same time I tried using VPN Policy-Based Routing but no luck I can see that both vpns are working but traffic only goes throw first vpn .

what I did was created interface 1 named tun0 for first vpn same thing for my second vpn named tun1, then created two firewalls and assigned them for tun0, and tun1 now I need how to forward these firewalls
tun0--> ?
the reason why I'm doing this because I need to open port 44158 for two devices on my network and because I can't forward the same port for two devices I'm using 2 vpn each one with it's own ipv4 and port forward .