Hello, Wade Yang,
Thank you for the response.
1/ You can enable Mega Menu Dropdown Full-Width via Theme options > Header Builder > Menu.
2/ Default Product Sorting for Shop page comes from WooCommerce plugin and it is independent of our theme. You can change it via Appearance> Customize > WooCommerce > Product catalog, or contact support of the WooCommerce plugin – https://wordpress.org/support/plugin/woocommerce/
If you have any additional questions or concerns, please do not hesitate to reach out to us. Our support team is always available to assist you.
Kind Regards,
8theme team