Hamburger Menu Customization

what you try to influence on the hamburger script file?

you can deregister the parent script and register child-theme edited files then.
My recommendation is to have the same tree structure as the parent – create a js subfolder in your child-theme directory.

if you use the option of enfold to use minified files – you had to upload both files – in your case:
avia-snippet-hamburger-menu.js and avia-snippet-hamburger-menu.min.js

to get the minified version you can use this : https://codebeautify.org/minify-js

put this in your child-theme functions.php :

function wp_change_hamburger_script() {
  $vn = avia_get_theme_version();
  $child_theme_url = get_stylesheet_directory_uri();
  $min_js = avia_minify_extension( 'js' );

  wp_deregister_script( 'avia-hamburger-menu' );
  wp_enqueue_script('avia-hamburger-menu-child', "{$child_theme_url}/js/avia-snippet-hamburger-menu{$min_js}.js", array('avia-default'), $vn, true);
}
add_action( 'wp_enqueue_scripts', 'wp_change_hamburger_script', 100 );

@Ismael : can you erase from GitHub Library on “Online Resources from Third Party Developers” the
“Disable loading of Google fonts and host them on your on server by Guenni007Disable loading of Google fonts and host them on your on server by Guenni007”
it is a bit deprecated since Enfold Font Manager is established.

https://github.com/KriesiMedia/enfold-library

on the bottom of that page there is a link under “Online Resources from Third Party Developers”