Restrict max files uploaded based on user selected package for WP Job Manager Field Editor

functions.php

<?php

add_filter( 'submit_job_form_fields', 'smyles_custom_max_images_per_package', 101 );

function smyles_custom_max_images_per_package( $fields ) {

	$max_packages = 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
			'main_image'   => 1,
			// Another example meta key
			'job_file_upload' => 1,
		),
		// So below, the product ID is 22222
		'22222' => array(
			'main_image'   => 2,
			'job_file_upload' => 2,
		),
		'33333' => array(
			'main_image'   => 3,
			'job_file_upload' => 3,
		),
		'44444' => array(
			'main_image'   => 4,
			'job_file_upload' => 4,
		),
	);

	$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, $max_packages ) ) {

		// Example "job_file_upload" max uploads
		// Uncomment code below to enable for example meta key
		//if ( array_key_exists( 'job', $fields ) && array_key_exists( 'job_file_upload', $fields['job'] ) ) {
		//	$fields['job']['job_file_upload']['max_uploads'] = $max_packages[ $job_package ]['job_file_upload'];
		//}

		// main_image max uploads (the Listable main_image is under the company fields, not job fields)
		if ( array_key_exists( 'company', $fields ) && array_key_exists( 'main_image', $fields['company'] ) ) {
			$fields['company']['main_image']['max_uploads'] = $max_packages[ $job_package ]['main_image'];
		}
	}

	return $fields;
}

functionsv2.php

<?php

add_filter( 'submit_job_form_fields', 'smyles_custom_max_images_per_package', 101 );

function smyles_custom_max_images_per_package( $fields ) {

	$max_packages = 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
			'main_image'   => 1,
			// Another example meta key
			'job_file_upload' => 1,
		),
		// So below, the product ID is 22222
		'22222' => array(
			'main_image'   => 2,
			'job_file_upload' => 2,
		),
		'33333' => array(
			'main_image'   => 3,
			'job_file_upload' => 3,
		),
		'44444' => array(
			'main_image'   => 4,
			'job_file_upload' => 4,
		),
	);

	$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, $max_packages ) ) {

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

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

	return $fields;
}

Here's an example of doing this just for gallery_images field:
https://gist.github.com/tripflex/c3cabb264ae00867a71dbb461dfd6303