gpnf-add-required-label.php

<?php
/**
 * Gravity Perks // Nested Forms // Add `Required` label to Nested Form field
 * https://gravitywiz.com/documentation/gravity-forms-nested-forms/
 *
 * Adds a `Required` label to a Nested Form field when a minimum child entry limit is set.
 */
// Replace `123` with your form ID and `4` with your Nested Form field ID
add_filter( 'gform_field_content_123_4', function ( $content, $field, $value, $lead_id, $form_id ) {
	
	if( $field->gpnfEntryLimitMin > 0 ){
	
    	$content = str_replace  ( $field->label, $field->label. '<span class="gfield_required">' . GFFormsModel::get_required_indicator( $form_id ) . '</span>', $content );
		
	}
	
    return $content;
	
}, 10, 5 );