You can play Lounge 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 Lounge SMP IP Address 45.15.25.182in the “Server Address” and the Lounge SMP port 19132 in the “Port.” Then press “Save” and start playing.