Reply To: disable header

Hello,

To disable the footer for the checkout page edit the page and disable the footer.

Screenshot for Clarification: https://prnt.sc/10jlq8a

And to remove the header try adding the following Custom CSS in the Global Custom CSS area under Theme Settings >> Custom CSS.

.woocommerce-checkout .whb-header {
    display: none;
}

Regards.
Xtemos Studios