Hello,

We are talking about the functions.php file in the child theme and you can see it only while editing your theme files using FTP like Filezilla for example. And be sure that you have enabled child theme before. https://xtemos.com/docs/woodmart/child-theme/

As for WooCommerce products management, we suggest you to read plugin’s documentation for all the instruction since it is not a part of the theme https://docs.woocommerce.com/document/managing-products/

Regards