functions.php

<?php
add_action('woocommerce_email_footer', 'raq_quote_email', 1);
function raq_quote_email( $email ){
	if( is_a( $email, 'YITH_YWRAQ_Send_Quote') && isset( $email->raq) ){
		$raq = $email->raq;
		$order = wc_get_order($raq['order-id']);
		$other_fields          = $order->get_meta('ywraq_other_email_fields', true );
		foreach ( $other_fields as $key => $value ){
			printf( '<p><strong>%s:</strong> %s</p>', $key,  esc_html( $value ) );
		}

	}
}