port forward with openVPN to access local machine remotely

I have an OpenVPN server set up on my AWS Linux instance and I can successfully use the OpenVPN client to connect to the server using an .ovpn configuration file. My question is how can I set up port forwarding to access web servers hosted on my local machine using myAwsPublicIp:openedPort without having to set up forwarding rules on my router. I already tried opening the port on my AWS firewall rules but that didn't do it. How does portmap.io achieve this? Any help is appreciated. Thanks in advance.