jetpack-amp-infinite-scroll-disable.php

<?php
/**
 * Jetpack AMP Infinite Scroll Disable plugin bootstrap.
 *
 * @package   Google\Mini_Plugin_Template
 * @author    Weston Ruter, Google
 * @license   GPL-2.0-or-later
 * @copyright 2020 Google Inc.
 *
 * @wordpress-plugin
 * Plugin Name: Jetpack AMP Infinite Scroll Disable
 * Plugin URI: https://gist.github.com/westonruter/a9ed25d4fb5a31f6c9cae2b6fa076c7a
 * Description: Disable Jetpack's Infinite Scroll on AMP pages. This is a workaround for a broken AMP implementation in Jetpack. See <a href="https://github.com/Automattic/jetpack/pull/17497">jetpack#17497</a>.
 * Version: 0.1
 * Author: Weston Ruter, Google
 * Author URI: https://weston.ruter.net/
 * License: GNU General Public License v2 (or later)
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 * Gist Plugin URI: https://gist.github.com/westonruter/a9ed25d4fb5a31f6c9cae2b6fa076c7a
 */

add_action(
	'plugins_loaded',
	function () {
		$priority = has_action( 'init', 'the_neverending_home_page_init' );
		if ( false === $priority ) {
			return;
		}

		remove_action( 'init', 'the_neverending_home_page_init', $priority );
		add_action(
			'wp',
			function () {
				if ( function_exists( 'is_amp_endpoint' ) && is_amp_endpoint() ) {
					return;
				}
				the_neverending_home_page_init();
			},
			~PHP_INT_MAX
		);
	},
	PHP_INT_MAX
);

Installation instructions: https://gist.github.com/westonruter/6110fbc4bef0c4b8c021a112012f7e9c