woocommerce/plugins/woocommerce-blocks/assets/js/blocks/order-confirmation/billing-address/style.scss

// Parent element should hide column when there is no address.
.woocommerce-order-confirmation-address-wrapper {
	.wp-block-column:empty {
		display: none;
	}
}

// Prevent margin on the first element in this wrapper.
.wp-block-woocommerce-order-confirmation-billing-wrapper > *:first-child {
	margin-top: 0;
}
.wp-block-woocommerce-order-confirmation-billing-wrapper {
	.block-editor-block-list__layout > *:first-child {
		margin-top: 0 !important;
	}
}
.wc-block-order-confirmation-billing-address {
	border: 1px solid $universal-border-light;
	border-radius: $universal-border-radius;
	padding: $gap;

	address,
	p {
		width: 100% !important;
		display: block;
		box-sizing: border-box;
		margin: 0 0 $gap;

		&:last-child {
			margin-bottom: 0;
		}
	}
}