A custom AMP theme built on AMPforWP plugin, more details at https://ampforwp.com/step-step-guide-modify-amp-theme
Just change the lines here: https://github.com/MohammedKaludi/ampforwp-custom-theme/blob/master/ampforwp-custom-theme.php#L53
into this:
if ( is_single() || is_page() ) { if('single' === $type && !('product' === $post->post_type )) { if ( $post->ID == 'POST ID') { $file = AMPFORWP_CUSTOM_THEME . '/template/custom-template.php'; } else { $file = AMPFORWP_CUSTOM_THEME . '/template/single.php'; } } }
You can use this code for any number of pages/posts you want to create.