You can play NoplexSMP by adding the server in the Minecraft launcher.
On Minecraft Java Edition, open the Minecraft launcher. Click “Multiplayer” and then “Add Server” and enter the NoplexSMP IP Address noplexsmp.xyz in the “Server Address”. Then press “Done” and start playing.
On Minecraft Bedrock Edition, open the Minecraft launcher or Minecraft app. Go to the “Servers” tab and press “Add Server.” Enter the NoplexSMP IP Address noplexsmp.xyzin the “Server Address” and the NoplexSMP port 22334 in the “Port.” Then press “Save” and start playing.