Hello,
01. Navigate to Theme Settings > Product Archive > Products Styles > Disable the option “Product Categories”.
02. You cannot directly edit the checkout page because it comes from WooCommerce end and isn’t directly editable with the Page Builder plugins because WooCommerce doesn’t allow it to do so.
But under the WoodMart Theme, using the Theme’s Layout Builder you can create Custom Layouts for WooCommerce pages like Shop, Category, Single Product page, Cart and Checkouts. So, you can use that to create your own custom layouts for these pages.
Further, you can read more about the Layout Builder here: https://xtemos.com/docs-topic/woodmart-woocommerce-layout-builder/
Also, Navigate to Theme Settings > Shop > Checkout and check the option.
Best Regards.