Datalabels not showing on Apexcharts

Configuration Frontend
1 
type: custom:apexcharts-card
apex_config:
  chart:
    height: 150
    type: bar
  xaxis:
    type: category
    labels:
      rotate: -45
      formatter: EVAL:function(value) { return value.split(':')[0] + 'h'; }
  yaxis:
    - min: 0
      max: ~12
      labels:
        formatter: EVAL:function(val, opts) { return val.toFixed(0); }    
    dataLabels:
      enabled: true
  
  plotOptions:
    bar:
      columnWidth: 50%
header:
  show: true
  show_states: false
series:
  - entity: sensor.uv_forecast_data
    name: UV Index
    type: column
    data_generator: |
      try {
        const data = JSON.parse(entity.state);
        return data.map(item => {
          let color = '#558B2F'; 
          let yValue = item.y;
          
          if (yValue <= 0) {
            yValue = 0.5; 
          } else {
            if (yValue <= 2) color = '#558B2F';
            else if (yValue <= 5) color = '#F9A825';
            else if (yValue <= 7) color = '#EF6C00';
            else if (yValue <= 10) color = '#B71C1C';
            else color = '#6A1B9A';
          }
          return {
            x: item.x,
            y: yValue,
            fillColor: color
          };
        });
      } catch (e) {
        return [];
      }