custom post template for AMP pages

HI there,

We are using the newspaper theme (Version: 10.4) with tagdiv mobile, composer, standard pack and official AMP plugins.
We are using mobile + AMP theme in Transitional mode
We would like to customize the template for posts, currently the AMP pages uses the template /wp-content/plugins/td-composer/mobile/single.php
Based on documentation of AMP plugin I added the newspaper-child theme and created a folder called amp in the child theme root and copied the single.php file to this folder renamed it to blog.php and created another copy and renamed to home.php, then added the following filter in the child theme functions.php:
add_filter( 'amp_post_template_file', function ( $template, $template_type, $post ) {
if ( 'page' === $template_type && 'page' === get_option( 'show_on_front' ) ) {
if ( (int) get_option( 'page_on_front' ) === $post->ID ) {
$template = dirname( __FILE__ ) . '/amp/home.php';
} elseif ( (int) get_option( 'page_for_posts' ) === $post->ID ) {
$template = dirname( __FILE__ ) . '/amp/blog.php';
}
}
return $template;
}, 10, 3 );
However the amp pages still called the posts template single.php from the td-composer plugin!!
I also tried adding the following filter in child theme functions.php:
add_filter( 'amp_post_template_file', function ( $file, $type ) {
if ( 'single' === $type ) {
$file = dirname( __FILE__ ) . '/amp/blog.php';
}
return $file;
}, 10, 3 );
This also doesn’t work.

Please let me know how do I create a custom template for posts only AMP pages without modifying the single.php in the td-composer plugin because when the plugin is updated, my customization will be lost.

Thanks!

Thanks Bettina for the suggestion. But I guess you didn’t read thoroughly I am not looking at you guys to customize a template; I’ll take care of the customization.
All I need is for the support team to point me to the function /hook that is responsible for the AMP pages to pick the single.php from the td-composer plugin and not from the child theme.

All I need is for the support team to point me to the function /hook that is responsible for the AMP pages to pick the single.php from the td-composer plugin and not from the child theme.