WooCommerce Admin Custom Order Fields - Allow custom order fields to be accessed by the WooCommerce REST API

wc-admin-custom-order-fields-wc-api.php

<?php // only copy this line if needed

function sv_wc_api_allow_acof_protected_meta() {
	add_filter( 'is_protected_meta', 'sv_wc_acof_is_protected_meta', 10, 2 );
}
add_action( 'woocommerce_api_loaded', 'sv_wc_api_allow_acof_protected_meta' );

function sv_wc_acof_is_protected_meta( $protected, $meta_key ) {

	if ( 0 === strpos( $meta_key, '_wc_acof_' ) ) {
		$protected = false;
	}

	return $protected;
}

Where would this code even go? Put in themes functions.php?

@bobby5892 yes.

Just wanted to thank you for this code! Helped out a lot. Appreciate it!