Hi there,
We use the plugin ad inserter and then short codes so we can change the adverts easily in one place not page by page but by,
adding this code under our normal advert code for the main site it worked a treat for AMP pages
<amp-ad width=”300″ height=”200″ type=”adsense”
data-ad-client=”ca-pub-1472451198705302″ **change to your own
data-ad-slot=”6115677183″> **change to your own
</amp-ad>
For related posts see this article here
https://isabelcastillo.com/related-posts-wp-amp
You can check our main site page here
https://thewhiteisle.co.uk/ibiza-2016-preview-part-3/
AMP version here
https://thewhiteisle.co.uk/ibiza-2016-preview-part-3/amp
hope this helps
Tristan