NGFOR ANGULAR INPUT

HTML

<div class="row col-12 ml-0 mt-5">
    <div class="col-3 mb-5" *ngFor="let tipochamado of ltipochamado">
      <div class="card text-white bg-info effect1">
        <div class="card-header">
          {{ tipochamado.nIdTipoChamado }} - {{ tipochamado.sDescricao }}
        </div>

        <div class="card-body">

          <div class="input-group mb-3">
            <input [(ngModel)]="nidcliente"  type="number" value="" class="form-control" placeholder="Matrícula"/>
            <div class="input-group-append">
              <a href="/">
              <button type="button" class="btn btn-secondary" (click)="confirma(tipochamado)">Ok</button>
              </a>
            </div>
          </div>
        </div>
      </div>
    </div>
</div>