selection-list.component.html

<cdk-virtual-scroll-viewport
   *ngIf="items?.length"
   class="selection-list col-lg-7"
   [itemSize]="74"
>
   <div
      class="item"
      [ngClass]="{ selected: selectedItems[item.id] }"
      *cdkVirtualFor="let item of items"
      (click)="selectItem(item)"
   >
      <input
         class="form-check-input mt-0 me-2"
         type="checkbox"
         [checked]="selectedItems[item.id]"
      />
      <div class="content">
         <ng-container
            [ngTemplateOutlet]="itemTemplateRef"
            [ngTemplateOutletContext]="{ $implicit: item }"
         ></ng-container>
      </div>
   </div>
</cdk-virtual-scroll-viewport>