If you're inserting Google Tag Manager's two code snippets into your Elementor site via hooks and the second one isn't showing up try this hook.

functions.php

add_action('elementor/page_templates/header-footer/before_content', 'myprefix_google_tag_manager_no_js');
function myprefix_google_tag_manager_no_js() {
	<!-- Google Tag Manager (noscript) -->
	<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-XXXXXXX"
	height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
	<!-- End Google Tag Manager (noscript) -->
}