Hello,
WooCommerce has developed a new checkout page available through Gutenberg, which differs from the existing checkout form. You can choose to use either of these checkout forms on your website. While WoodMart adds many features to the traditional checkout form, the new checkout form is fully managed by WooCommerce.
Try to enable the Cart/Checkout templates from theme instead of Gutenberg, you need to edit those pages and remove all Gutenberg blocks (https://monosnap.com/file/DYynCYO5DELtMiDQW2E99Yhx3TFPCs). Then define such shortcode for the checkout: https://take.ms/8yG9B , and for the Cart: https://take.ms/1bnqH , then those pages will be shown with the theme’s design.
https://woo.com/document/woocommerce-shortcodes/
Then recheck the issue.
Kind regards.