[Solved]-how to display data labels / stacklabels for a grouped highhcarts- Highcharts-Highcharts

Please analyze this demo: https://jsfiddle.net/BlackLabel/2ouLy1vj/

In the formatter callback, you can set wanted format to display as a dataLabel.

  dataLabels: {
    enabled: true,
    verticalAlign: 'bottom',
    overflow: 'none',
    crop: false,
    //y: 20,
    formatter() {
      return this.series.name;
    }
  }

Also, I copied the logic from your previous question: how to determine the width of every column series present in the chart- highhcarts