You can play Reborn Kingdoms by adding the server in the Minecraft launcher.
On Minecraft Bedrock Edition, open the Minecraft launcher or Minecraft app. Go to the “Servers” tab and press “Add Server.” Enter the Reborn Kingdoms IP Address 51.75.173.69in the “Server Address” and the Reborn Kingdoms port 19132 in the “Port.” Then press “Save” and start playing.