Add a task which perform in the scheduled event. See https://maheshwaghmare.com/doc/wordpress-cron/

perform-scheduled-task.php

<?php
/**
 * Task to perform
 * 
 * @todo Change the `prefix_` and with your own unique prefix.
 * 
 * @since 1.0.0
 * 
 * @return void
 */
if( ! function_exists( 'prefix_cron_task' ) ) :
    function prefix_cron_task() {
        error_log( 'Called' );
    }
    add_action( 'prefix_cron_hook', 'prefix_cron_task' );
endif;