AutomateWoo - Using shop.products custom filter option

functions.php

<?php
/**
 * Use variable {{ shop.products | type: 'custom', filter: 'my_shop_products_custom_filter' }}
 */
add_filter( 'my_shop_products_custom_filter', 'my_shop_products_custom_filter', 10, 2 );

/**
 * @param $product_ids array
 * @param $workflow AutomateWoo\Workflow
 * @return array
 */
function my_shop_products_custom_filter( $product_ids, $workflow ) {
	// add product queries here
	return [ 586, 4033, 582 ]; // return ids of products
}