Set field default value based on selected package when using WP Job Manager Field Editor

functions.php

<?php
add_filter( 'submit_job_form_fields', 'smyles_custom_default_per_package', 101 );

function smyles_custom_default_per_package( $fields ) {

	$packages_config = array(
		// The key should be the ID of the product (look at the ID when editing the product in the URL bar)
		'11111' => array(
			// Array key should be the exact meta key
			'job_type' => 'freelance',
		),
		// So below, the product ID is 22222
		'22222' => array(
				// Array key should be the exact meta key
				'job_type' => 'full-time',
			),
		);

	$product_id  = isset( $_REQUEST['wcpl_jmfe_product_id'] ) ? intval( $_REQUEST['wcpl_jmfe_product_id'] ) : '';
	$job_package = isset( $_REQUEST['job_package'] ) ? sanitize_text_field( $_REQUEST['job_package'] ) : $product_id;
	$job_id      = isset( $_REQUEST['job_id'] ) ? intval( $_REQUEST['job_id'] ) : false;

	// Product/Package Handling, get job_package from post meta
	if ( $job_id && empty( $job_package ) && class_exists( 'WP_Job_Manager_Field_Editor_Package_WC' ) ) {
		$job_package = WP_Job_Manager_Field_Editor_Package_WC::get_post_package_id( $job_id );
	}

	if ( ! empty( $job_package ) && array_key_exists( $job_package, $packages_config ) ) {

		foreach ( (array) $packages_config[ $job_package ] as $meta_key => $default ) {
			
			if( isset( $fields['job'], $fields['job'][ $meta_key ] ) ){
				$fields['job'][$meta_key]['default'] = $default;
			}

			// Also check in company fields for the meta key field
			if ( isset( $fields['company'], $fields['company'][ $meta_key ] ) ) {
				$fields['company'][ $meta_key ]['default'] = $default;
			}
		}
		
	}

	return $fields;
}