Anyone has idea how to beautify windows terminal like this

Steps on how to customize Windows Terminal - Github Link - https://github.com/anup-a/Beautify-your-Windows-Terminal

Link to the dev.to article - https://dev.to/anupa/beautify-your-windows-terminal-1la8

That is Powerline for Powershell. You can go here for help setting that up.

The background is transparent and acryllic which you can turn on in your Powershell profile in settings.json by setting "useAcrylic": true and "acrylicOpacity": 0.4 which would look something like this:

{
  // Make changes here to the powershell.exe profile.
  "guid": "{YOUR GUID HERE}",
  "name": "Windows PowerShell",
  "commandline": "powershell.exe",
  "useAcrylic": true,
  "acrylicOpacity": 0.4,
  "hidden": false
},

If you are on Windows, make sure you have 'Transparency effects' turned on in Personalize-->Colors