Woocommerce - Create code to make all new products imported from Square hidden by default

I use the Woocommerce Square plugin to import new products from Square to my Woocommerce (Wordpress) store. I need a custom code to automatically make all new imported product visibility = "hidden" instead of visible in catalog and search.

Plugins used: Woocommerce and Woocommerce Square (https://wordpress.org/plugins/woocommerce-square/)