Control value: {{myControl.value || 'empty'}}

<form class="example-form">
  <mat-form-field class="example-full-width">
    <mat-label>Number</mat-label>
    <input #input
           type="text"
           placeholder="Pick one"
           matInput
           [formControl]="myControl"
           [matAutocomplete]="auto"
           (input)="filter()"
           (focus)="filter()">
    <mat-autocomplete requireSelection #auto="matAutocomplete">
      @for (option of filteredOptions; track option) {
        <mat-option [value]="option">{{option}}</mat-option>
      }
    </mat-autocomplete>
  </mat-form-field>
</form>