Hello, @carliczyk,
Thank you for contacting us and for using XStore.
We would like to inform you that our products are managed through the WooCommerce plugin. For detailed instructions on how to effectively handle this, please refer to the WooCommerce plugin documentation available at: (https://woocommerce.com/document/managing-products/).
We trust this resource will be helpful to you. Should you require any further assistance, please do not hesitate to reach out. We are here to help you.
Best regards,
The 8Theme Team