You can play T.B.C 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 T.B.C IP Address TBC.mcserv.mein the “Server Address” and the T.B.C port 19132 in the “Port.” Then press “Save” and start playing.