Found my own answer.
To get the elementor template list you can use this snippets code
$args = array(
'post_type' => 'elementor_library',
// 'posts_per_page' => 30,
'tabs_group' => 'library',
'elementor_library_type' => 'page',
);
$elementor_templates = get_posts($args);
Now, to display it as dropdown select element, you can iterate through elementor_templates
foreach ($elementor_templates as $elementor_template) {
echo $elementor_template->post_title;
}