A very simple function to execute custom JS after an ajax request with a specific WordPress action is triggered

functions.php

<?php

add_action( 'wp_enqueue_scripts', 'myprefix_add_custom_js');

function myprefix_add_custom_js() {
	wp_add_inline_script( 'jquery',
		'
		jQuery(function($) {
			/**
			* catch AJAX complete events, to catch wordpress actions
			* @param {jQuery.Event} event
			* @param {jqXHR} xhr XmlHttpRequest object
			* @param {Object} ajaxOpts options for the AJAX request
			*/
			$(document).ajaxComplete(function(event, xhr, ajaxOpts) {

				// Specify the AJAX action after which you want to execute your JS
				if ("data" in ajaxOpts && ajaxOpts.data.indexOf("action=wp_pro_quiz_load_quiz_data") != -1) {
					// JS Code that runs after the specified WP action
					alert(1)
				}
			});

		});
		'
	);
}

Place this in your WP child theme's functions.php file and enjoy playing around.
The default example will show an alert message when the LearnDash Quiz start button is clicked on a LearnDash Quiz page. Note that in this example we target the AJAX request triggered after a user clicks the Start Quiz button, the ajax request contains the action wp_pro_quiz_load_quiz_data. You can apply your own custom JS after an AJAX request where a different action is called.

Any queries, reach me out via my site,
https://elearningevolve.com/contact/