Modify FB retailed ID of the product before syncing - using Product Catalog Sync for WooCommerce by WebToffee

functions.php

<?php // Do not copy this line.

add_filter('wt_fb_sync_product_retailer_id', 'wt_fb_sync_product_retailer_id', 10, 2);

function wt_fb_sync_product_retailer_id($fb_retailer_id, $product) {
	
	$fb_retailer_id = $product->get_sku() ? $product->get_sku() : 'wc_post_id_' . $product->get_id();
	return $fb_retailer_id;
  
}