Hello @ssbukowski,
Thanks for asking.
Generally speaking Google indexes all the content that’s present on a crawlable page. However, if you want to add the code that’s given in the Google developer page, please add following code in child theme function.php file:
add_action( 'wp_head', 'add_head_script', 999 );
function add_head_script(){
?>
<rss version="2.0" xmlns:googleplay="http://www.google.com/schemas/play-podcasts/1.0" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">
<?php
}
You can download and setup child theme using following resources:
https://theme.co/apex/child-themes
I also noticed that for podcasting you are using smartpodcastplayer plugin. In that regards I request you to please get in touch with plugin developer for further SEO related questions pertaining to podcast as it will fall outside the scope of support we can offer.
Thanks for understanding.