show cities / states in checkout dropdown options if exist in shipping zone

Hello

I’m trying to show only states / cities and hide others , the showing or available states are added to shipping zone !
its like selling to specific country on woocommerce option

but my condition based on shipping zone , hide all from checkout and

show state only if added in shipping zone

i tried a lot of functions like this one below

add_filter( ‘woocommerce_checkout_fields’, ‘filter_checkout_fields_based_on_shipping_zones’ );

function filter_checkout_fields_based_on_shipping_zones( $fields ) {
// Get all the shipping zones
$shipping_zones = WC_Shipping_Zones::get_zones();
$allowed_states = array();

// Loop through each shipping zone
foreach ( $shipping_zones as $zone ) {
    // Get the zone regions
    $zone_regions = $zone['zone_locations'];
    foreach ( $zone_regions as $region ) {
        // If the region type is a state, add it to the allowed states
        if ( 'state' === $region->type ) {
            $allowed_states[] = $region->code;
        }
    }
}

// Ensure allowed states are unique to avoid duplicates
$allowed_states = array_unique( $allowed_states );

// Filter out states not included in any shipping zone
foreach ( $fields['billing']['billing_state']['options'] as $state_code => $state_name ) {
    if ( ! in_array( $state_code, $allowed_states, true ) ) {
        unset( $fields['billing']['billing_state']['options'][$state_code] );
    }
}

foreach ( $fields['shipping']['shipping_state']['options'] as $state_code => $state_name ) {
    if ( ! in_array( $state_code, $allowed_states, true ) ) {
        unset( $fields['shipping']['shipping_state']['options'][$state_code] );
    }
}

return $fields;

}