Why Zoom plugin is not working of chart js?

It seems to me that your zoom options should be under the key plugins.

See this example for the basic config.

Something like this:

options: {
plugins: {
  zoom: {
    zoom: {
      wheel: {
        enabled: true,
      },
      pinch: {
        enabled: true
      },
      mode: 'xy',
    }
  }
}