Installation Instruction: Extract and put the headwinsim-wxradar-a330-900-dev folder into your Community folder.

How to activate Weather Radar:

On the WX Radar panel, flip the SYS switch to 1 or 2 position
SYS 1 will activate the WX radar on the captain side only, and SYS 2 will activate the FO side only
Disclaimer:

All credits pazzini256

https://es.flightsim.to/file/57681/weather-radar-mod-for-fbw-a320-neo-development-version