Validate nested forms inside *ngfor in angular

See more:

Angular6

Angular7

I have a nested form inside *ngFor in Angular. How can I get validation status of all forms?

Below is my code

<pre><div *ngFor="let row of Items">
  <form #budgetForm="ngForm">

    <input required matInput name="Amount" [(ngModel)]="row.Amount">

  </form>
  {{budgetForm.valid}}
</div>

What I have tried:

I enclosed the nested form inside main form and it did not work