You can play BlueHollow 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 BlueHollow IP Address 135.148.5.117in the “Server Address” and the BlueHollow port 19132 in the “Port.” Then press “Save” and start playing.