<mat-accordion>
    <mat-expansion-panel>
      <mat-expansion-panel-header>
        <mat-panel-title>
          Personal data
        </mat-panel-title>
      </mat-expansion-panel-header>
      blablabla
    </mat-expansion-panel>
    <mat-expansion-panel>
      <mat-expansion-panel-header>
        <mat-panel-title>
          Public data
        </mat-panel-title>
      </mat-expansion-panel-header>
      blablabla
    </mat-expansion-panel>
    <mat-expansion-panel disabled>
      <mat-expansion-panel-header>
        <mat-panel-title>
          Disabled
        </mat-panel-title>
      </mat-expansion-panel-header>
    </mat-expansion-panel>
</mat-accordion>