If you you DOM to show your RSS in your HTML you will find the in the end of the content "Continue reading" and with the permalink(). You can check my feed here
This is the script before end of tag
<p class="link-more"><a href="https://www.eitren.com/blog/products/bagaimana-cara-page-halaman-link-website-di-halaman-pertama-google-search-engine/" class="more-link">Continue reading<span class="screen-reader-text"> "Bagaimana cara page/halaman/link website di halaman pertama Google Search Engine?"</span></a></p>]]></description>I would like to modify the link add /AMP/ at the end of link. So it would become "...google-search-engine/amp/" class...