LoraGateway not connecting to global server

I am using RAK2247(Semtech SX1301 LoRa) device, connected to RaspberryPi-3B. I have installed the Gateway OS(chirpstack-gateway-os-full-raspberrypi3-20210918094417.rootfs.wic) and configured the MQTT server’s topic.
As the result I am getting the MQTT Published payload.

Is there a way to connect the LoRa device to Global IP-server address instead of local? Can we connect it from anywhere using http://global_IP:8080/dashboard.