Change Admin Activity emails recipient from Site Admin to the specified email address

redirect_admin_activity_emails.php

<?php
/**
 * The function below will change the recipient of Admin Activity Emails.
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function my_pmpro_redirect_admin_activity_emails( $recipient, $email ) {
	if ( $email->template == "admin_activity_email" ) {
  		$recipient = "someone@example.com"; // New admin activity recipient email goes here
	}	
	return $recipient;
}
add_filter( 'pmpro_email_recipient', 'my_pmpro_redirect_admin_activity_emails', 10, 2 );