You can validate in this way as well
In your template(.html file):
<form
  [formGroup]="userForm"
  #formDirective="ngForm"
  (ngSubmit)="onFormSubmit()"
>
  <div class="form-control">
    <mat-form-field appearance="outline" class="form-field">
      <mat-label>Email Address</mat-label>
      <input
        type="text"
        matInput
        formControlName="email"
        class="form-input-field"
        pattern="[a-zA-Z0-9.-_]{1,}@[a-zA-Z.-]{2,}[.]{1}[a-zA-Z]{2,}"
      />
      <mat-error *ngIf="userForm.get('email').hasError('required')"
        >Email is required</mat-error
      >
      <mat-error *ngIf="userForm.get('email').hasError('email')"
        >Please enter a valid email address
      </mat-error>
    </mat-form-field>
  </div>
</form>
In your component(.ts file):
userForm = new FormGroup({
  email: new FormControl('', [Validators.required, Validators.email]),
});