@hansdaigle One way to hide a specific section in a pie chart is to set the data of this section to undefined.

You can then dynamically update the data array and use our update() method to update the chart. Here is an example:

HTML:

      <canvas mdbChart [type]="'pie'" [datasets]="pieDatasets" [labels]="pieLabels" #pie="mdbChart"></canvas>
      <button class="btn btn-primary" (click)="showData()">Toggle data</button>

TS:

@ViewChild('pie', { static: true }) pie: MdbChartDirective;

  pieDatasets = [
    {
      label: 'Traffic',
      data: [undefined, 2343, 2545],
      backgroundColor: [
        'rgba(63, 81, 181, 0.5)',
        'rgba(77, 182, 172, 0.5)',
        'rgba(66, 133, 244, 0.5)',
      ],
    },
  ];

  pieLabels = ['COMPLETED', 'NOT_FOUND', 'PICKED_UP'];

  showData() {
    this.pieDatasets[0].data = [2112, 2343, 2545];
    this.pie.update();
  }

However, the effect is not exactly the same as the one you described, there will be no strikethrough in the legend. We will check if there is a better solution to this problem and let you know what we found.