Mat-autocomplete - How to access selected option?

I know that [value] stores the selected Object (Offer in my case). According to materials documentation, optionSelected emits an event. I tried [optionSelected] = "fooFn" but it doesn't exist. I just want to access the Offer object. Thanks!

offer-search.component.html:

  <h5 #offerP>option - autoComplete</h5>
  <mat-form-field id="form-field">
    <input type="text" matInput [formControl]="myControl" [matAutocomplete]="auto">
    <mat-autocomplete #auto="matAutocomplete" [displayWith]="displayFn">
      <mat-option *ngFor="let option of filteredOptions$ | async" [value]="option">
        {{ option.foodItem.name }}
    </mat-option>
  </mat-autocomplete>
  </mat-form-field>

You can use it like :

<mat-autocomplete #auto="matAutocomplete" (optionSelected)='getPosts($event.option.value)'>

WORKING DEMO

It can be done in two ways

1. Using onSelectionChange which emits MatOptionSelectionChange from mat-option

<mat-autocomplete #auto="matAutocomplete">
	<mat-option
	  *ngFor="let option of options"
	  [value]="option"
	  (onSelectionChange)="updateMySelection($event)"
	>
	  {{ option }}
	</mat-option>
</mat-autocomplete>

2. Using optionSelected which emits MatAutocompleteSelectedEvent from mat-autocomplete

<mat-autocomplete 
  #auto="matAutocomplete"
  (optionSelected)="updateMySelection($event)">
	<mat-option
	  *ngFor="let option of options"
	  [value]="option"
	>
	  {{ option }}
	</mat-option>
</mat-autocomplete>

 <mat-form-field floatLabel="always">
            <mat-label>UTBMS Activity Codes</mat-label>
            <input type="text" placeholder="Activity Codes"  [(ngModel)]="activityCode"  aria-label="Number" matInput [formControl]="utbmsActivityCodesControl"
              [matAutocomplete]="autoActivityCodes">
            <mat-autocomplete autoActiveFirstOption #autoActivityCodes="matAutocomplete">
              <mat-option *ngFor="let option of utbmsActivityCodes | async" (onSelectionChange)="setBillingActivity(option)"  [value]="option.code">
                {{option.name}}
              </mat-option>
            </mat-autocomplete>
          </mat-form-field>

setBillingActivity(object){
    this.actionData.libraryContent.billingActivityId=object.activityId;
  }

If you need to get the whole OBJECT and use its children values in the component use this solution

https://stackoverflow.com/a/69652848/3944285