You can play FOGC SMP 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 FOGC SMP IP Address fogc.ddns.netin the “Server Address” and the FOGC SMP port 19132 in the “Port.” Then press “Save” and start playing.