Override Header Layout in Avada Child Theme

aggregate_files.php

<?php
/* Override (modify) the Avada header layouts in a child theme by establishing a local version. */

/* Avada has 6 header layouts selectable via Avada > Theme Options > Header > Header Content. These map to files at
  "/wp-content/themes/Avada/templates". You can use your browser's devtools to look in the header for something like
  '<div class="fusion-header-v1 ... ">' which will help identify what's being used, if you don't already know.
*/

// Copy this block from "/wp-content/themes/Avada/templates/header.php". If you are not using header_1 then copy the appropriate block.
if ( ! function_exists( 'avada_header_1' ) ) {
	function avada_header_1() {
		if ( ! in_array( Avada()->settings->get( 'header_layout' ), array( 'v1', 'v2', 'v3' ) ) ) {
			return;
		}
		get_template_part( 'templates/header-1' );
	}
}
add_action( 'avada_header', 'avada_header_1', 20 );

// Don't change anything in the code, just add the block to your child-theme's 'functions.php'.

// Copy the appropriate file from "/wp-content/themes/Avada/templates", in this case 'header-1.php', to the same folder in the child theme, like "/wp-content/themes/Avada-Child-Theme/templates/header-1.php.
?>
<div class="fusion-header">
	<div class="fusion-row">
		<?php avada_logo(); ?>
		<?php avada_main_menu(); ?>
	</div>
</div>

<?php
// Make your changes to the copy of header-1.php in the child-theme folder. That copy will be called during the "avada_header" action.
?>
<div class="fusion-header">
	<div class="fusion-row">
	  <!-- New thing. -->
	  <button class="reservations"><a href="tel:1-123-456-7890">Call for Reservations</a></button>
		<?php avada_logo(); ?>
		<?php avada_main_menu(); ?>
	</div>
</div>