Use ACF local JSON file for get_all_custom_field_meta().

acf-local-json.php

<?php

// Replace with the name of your field group JSON.
$field_group_json = 'group_59e226a200966.json';

$field_group_array = json_decode( file_get_contents( get_stylesheet_directory() . "/acf-json/{$field_group_json}" ), true );

// Omit this line when using the Field Group Values package/plugin.
$config = $field_group_array['fields'];

$meta_data = get_all_custom_field_meta( get_the_ID(), $config );

you might want to check if the file exists before decoding the json