Advanced Custom fields content are not showing it

You will have to use a filter to append an ACF field to the footer or content. See the docs for how to use a filter for the footer. We did this to append an ACF field to bottom of the content. Works ??

Hi neotrope, thank you for your reply, I have managed to call my template content parts by editing the single template on the plugin, adding this code snippet and deleting the sanitise content displayed from the plugin. I could have use a function to overwrite the single plugin template but for now I will have to use this until I found a better way to do it.
I have noticed that the class-amp-content.php on line 37 is calling the_content I wonder if we can change it to acf_the_content ?

<?php
    if( has_term( 'written', 'post_style' )) :
        get_template_part('templates/content', 'written');

    elseif( has_term( 'list', 'post_style' )) :
        get_template_part('templates/content', 'list');                 

    elseif( has_term( 'unordered-list', 'post_style' )) :
        get_template_part('templates/content', 'unordered-list');                 

    elseif( has_term( 'photo', 'post_style' )) :
        get_template_part('templates/content', 'photo');                 

    elseif( has_term( 'video', 'post_style' )) :
        get_template_part('templates/content', 'video');            

    else :
        get_template_part('templates/content', 'single');

    endif;
 ?>

One thing you can do is create a custom template, as described here in the AMP plugin’s readme file: https://github.com/Automattic/amp-wp/blob/master/readme.md#custom-template