A: Hi,

We do not actually have Demos WooCommerce Checkout page as we can not place multiple Checkout page on single site.
But we do have documentation about our Woo Builder which might help:
https://exclusiveaddons.com/docs/widgets-docs/exclusive-woobuilder-documentation/

We're working on a documentation right now about the Checkout page that'll help you styling your checkout page easily.
I'll share that to you as soon as we get it up.

Thank You