JetFormBuilder Hierarchical Select set not required levels if empty

code.html

<style>
    .jet-form-builder-hr-select-level.not-required .jet-form-builder__required {
        display: none;
    }
</style>
<script>
    
    jQuery( document ).ready( function( $ ) {
        
        $( window ).on( 'jet-form-builder/after-init', initWatchers );
        
        function initWatchers( e, $scope, observable ) {
            
            $scope[0].querySelectorAll('.jet-form-builder-hr-select-level').forEach( function( e ) {
                
                let selectNode = e.querySelector('select'),
                    selectWrap = selectNode.closest('.jet-form-builder__field-wrap');
                
                $( selectWrap ).on( 'jet-form-builder.hr-select.on-query', function( e, params ) {
                    setNotRequired( selectWrap );
                } );
                
                setNotRequired( selectWrap );
                
            } );
            
        }
        
        function getFormId( el ) {
            return el.closest( 'form' )?.dataset?.formId ?? false;
        }
        
        function setNotRequired( selectWrap ) {
            
            const observable = JetFormBuilder[ getFormId( selectWrap ) ];
            
            for ( const e of selectWrap.getElementsByTagName('select') ) {
                    
                const level = e.closest('.jet-form-builder-hr-select-level'),
                    input = observable.getInput( e.name );
                
                if ( e.getElementsByTagName('option').length < 2 ) {
                    
                    if ( e.required ) {
                        e.setAttribute( 'data-is-required', 1 );
                    }
                    
                    e.removeAttribute( 'required' );
                    level.classList.add( 'not-required' );
                    
                    input.isRequired = false;
                    input.reporting.isRequired = false;
                    
                    input.reporting.restrictions = input.reporting.restrictions.filter( function( r ) {
                        r.type !== 'required';
                    } );
                    
                } else if ( ( e.dataset.isRequired ) ) {
                    
                    input.isRequired = true;
                    input.reporting.isRequired = true;
                    e.setAttribute( 'required', 'required' );
                    level.classList.remove( 'not-required' );
                    
                    let addRestriction = true;
                    
                    input.reporting.restrictions.forEach( function( r ) {
                        if ( r.type === 'required' ) {
                            addRestriction = false;
                        }
                    } );
                    
                    if ( addRestriction ) {
                        
                        input.reporting.restrictions.push( new JetFormBuilderAbstract.RequiredRestriction() );
                        
                        input.reporting.restrictions.forEach( item => item.setReporting( input.reporting ) );
                    }
                
                }
                
            }
            
        };
        
    } );
    
</script>