You can play Auto-UHC live beta 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 Auto-UHC live beta IP Address 209.182.111.12in the “Server Address” and the Auto-UHC live beta port 19132 in the “Port.” Then press “Save” and start playing.