Adding field group for WooCommerce Category

Hi,

Currently, the extension MB Term Meta only supports showing the field on all terms of the taxonomy. I will create a feature request to support showing the field on specific terms, just like 'terms' => array( termID, or termSlug ).

You can try to create a condition before registering the meta box by coding. For example

add_filter( 'rwmb_meta_boxes', 'your_prefix_function_name' );

function your_prefix_function_name( $meta_boxes ) {
    $prefix = '';
    if( !is_admin() ) return;
    $list_product_cat = array(16, 18); // list of product category IDs
    if( $_GET['taxonomy'] == 'product_cat' && in_array( $_GET['tag_ID'], $list_product_cat ) ) {
        $meta_boxes[] = [
            'title'       => __( 'Term Meta', 'your-text-domain' ),
            'id'          => 'term-meta1',
            'taxonomies'  => ['product_cat'],
            'fields'      => [
                [
                    'name' => __( 'Text', 'your-text-domain' ),
                    'id'   => $prefix . 'text_opthfz8evwb',
                    'type' => 'text',
                ],
            ],
        ];
    }
    return $meta_boxes;
}

Hope that makes sense.