Woocommerce ajax return empty shipping packages - ajax

Question

Am trying to get the shipping packages with ajax but its always returning empty value.
same issue while trying to call get the zones with: WC_Shipping_Zones::get_zones();
am using the same code in woocommerce_checkout_before_order_review and its working without any issue!
function jsforwp_add_like() {
check_ajax_referer( 'jsforwp_likes_nonce' );
$packages = WC()->shipping->get_packages();
if(empty($packages)){
$check = 'empty';
}else{
$check = $packages;
}
$success = true;
if( true == $success ) {
$response['type'] = 'success';
$response['zone'] = $check;
}
$response = json_encode( $response );
echo $response ;
die();
}
add_action( 'wp_ajax_jsforwp_add_like', 'jsforwp_add_like' );
add_action( 'wp_ajax_nopriv_jsforwp_add_like', 'jsforwp_add_like' );
My javascript
add_action('wp_footer','my_custom_ajax');
function my_custom_ajax(){
?>
<script>
(function($){
$( document.body ).on( 'updated_checkout', function(){
$.ajax({
type : 'post',
dataType : 'json',
url : jsforwp_globals.ajax_url,
data : {
action: 'jsforwp_add_like',
_ajax_nonce: jsforwp_globals.nonce
},
success: function( response ) {
if( 'success' == response.type ) {
console.log( response );
}
else {
console.log( 'Something went wrong, try logging in!' );
}
}
});
} );
} )( jQuery );
</script>
<?php
}
returned value
{type: "success", zone: "empty"}