You can play VanillaSMP 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 VanillaSMP IP Address 198.55.118.212in the “Server Address” and the VanillaSMP port 19132 in the “Port.” Then press “Save” and start playing.