Unable to get updated values in form textfields using innerHTML in angular

I’m binding for using innerHTML

    this.html = this.sanitizer.bypassSecurityTrustHtml(
          '<iframe width="100%" height="800" src="assets/template_forms/registration_form.html"></iframe>',
        );

<div [innerHtml]="html"></div>

the form is rendered like this

enter image description here

if i entered some test in input fiekd thennot getting updated value in form input value when accessed html variable.

Any solution Thanks