Magento 2.4: Hide and disable billing and shipping address from checkout

I am using trust payments ad I want to hide and disable billing and shipping address from checkout(Place order without billing address).
I am able to hide the billing address by following this: https://bsscommerce.com/blog/magento-2-remove-billing-shipping-address-from-checkout/ but not able to place order without it.
Any help would be appreciated.