Hello, Damien
Please read this article from WooCommerce plugin first – https://woocommerce.com/document/managing-products/
Product us with URLs from your site and describe your request in more detail, please.
If the site is under maintenance mode, provide temporary wp-admin access also. To provide wp-admin access, you can create a new user account with administrator role via the Dashboard, and provide us with the username and password via the Private Content area.
Best Regards,
8Themes Team