FormBuilder - setting a field as 'required' does not implement any validation check
Creating a submission form using Form Builder, it is possible to set any given field to be 'Required'.
I'm assuming that by doing this the form could not then be submitted if the required field is empty. A validation error should be resented assisting the user to complete the required field/s.
In practice the form can be submitted with no alert or apparent validation check taking place.
Using CiviCRM 5.47.2 with Wordpress.