Populate custom order columns with data

woocommerce-populate-custom-order-columns.php

<?php

add_action( 'manage_shop_order_posts_custom_column', 'MY_COLUMNS_VALUES_FUNCTION', 2 );
function MY_COLUMNS_VALUES_FUNCTION( $column ) {
	global $post;
	$data = get_post_meta( $post->ID );
	
	//start editing, I was saving my fields for the orders as custom post meta
	//if you did the same, follow this code
	
	if ( $column == 'MY_COLUMN_ID_1' ) {
		echo ( isset( $data[ 'MY_COLUMN_1_POST_META_ID' ] ) ? $data[ 'MY_COLUMN_1_POST_META_ID' ] : '' );
	}
	
	if ( $column == 'MY_COLUMN_ID_2' ) {
		echo ( isset( $data[ 'MY_COLUMN_2_POST_META_ID' ] ) ? $data[ 'MY_COLUMN_2_POST_META_ID' ] : '' );
	}
}