Add Referred by to WooCommerce order list

Not tested but should work

function wprc_add_referred_by_col_header_woocommerce( $columns ) {

	$new_columns = array();

	foreach ( $columns as $column_name => $column_info ) {

		$new_columns[ $column_name ] = $column_info;

		if ( 'order_total' === $column_name ) {
			$new_columns['order_profit'] = __( 'Referred By' );
		}
	}

	return $new_columns;
}
add_filter( 'manage_edit-shop_order_columns', 'wprc_add_referred_by_col_header_woocommerce', 20 );

function wprc_fill_referred_by_col( $column ) {
	global $post;

	if ( 'invited_by' === $column ) {

		$order    = wc_get_order( $post->ID );
		$user_id = $order->get_customer_id();

			$referrer_id = ( new WP_Refer_Code( $user_id ) )->get_referrer_id();
			if ( empty( $referrer_id ) ) {
				echo '';
			}

			$referrer_username = esc_html(get_userdata( $referrer_id )->user_login);
			if ( current_user_can( 'edit_user', $referrer_id ) ) {
				$edit_link = esc_url( add_query_arg( 'wp_http_referer', urlencode( wp_unslash( $_SERVER['REQUEST_URI'] ) ), get_edit_user_link( $referrer_id ) ) );
				$edit      = "<strong><a href=\"{$edit_link}\">{$referrer_username}</a></strong>";
			} else {

				$edit = "<strong>{$referrer_username}</strong>";
			}

			echo $edit;
	}
}
add_action( 'manage_shop_order_posts_custom_column', 'wprc_fill_referred_by_col' );

Thank you very much indeed!