I’m not running your configuration so can’t tell you with the assurance that I have it working but Forwarding ports with firewalld appears to address port forwarding to rootless podman using firewalld. If that doesn’t work for you you might need to clarify what your firewalld configuration is that obscures the client IP. I wouldn’t expect a simple port mapping to affect IP address.
I’m not running your configuration so can’t tell you with the assurance that I have it working but Forwarding ports with firewalld appears to address port forwarding to rootless podman using firewalld. If that doesn’t work for you you might need to clarify what your firewalld configuration is that obscures the client IP. I wouldn’t expect a simple port mapping to affect IP address.