Hello @Eduardo,
You can edit the long description of the product using the Elementor page builder. To do this, you must first turn it ON from Elementor >> Settings >> General, as shown in the screenshots provided (https://postimg.cc/gxLw3cQh and https://postimg.cc/N5DMT9dL).
Additionally, you can change the style of the single product page elements from Theme Options >> WooCommerce >> Single Product Builder, as per your requirements. For more information, please refer to our theme documentation here: https://www.8theme.com/documentation/docs/single-product-page/.
Best Regards,
8Theme’s Team