Hello, Catholicans,
Actually, the Cart and Checkout pages are the default WooCommerce pages, and the theme does not have any influence on them except for some styling.
If you want to add some more fields or content on those pages, then you have to make it possible using Customization.
You can check this article as a reference: https://hollerwp.com/customize-woocommerce-checkout-page/ or contact support of WooCommerce plugin.
Kind Regards, 8theme team
