How to make country and city fields in woocomerce via select?

Question

WordPress

billing_country I get only through text input. But shipping_country is displayed by the select. But I need to change the first field in select. Please help
me here is the code I am using

<?php

 /**
 Remove all possible fields
 **/
function wc_remove_checkout_fields( $fields ) {

    // Billing fields
    unset( $fields['billing']['billing_company'] );
    unset( $fields['billing']['billing_email'] );
    unset( $fields['billing']['billing_phone'] );
    unset( $fields['billing']['billing_state'] );
    unset( $fields['billing']['billing_first_name'] );
    unset( $fields['billing']['billing_last_name'] );
    unset( $fields['billing']['billing_country'] );
    unset( $fields['billing']['billing_address_1'] );
    unset( $fields['billing']['billing_address_2'] );
    unset( $fields['billing']['billing_city'] );
    unset( $fields['billing']['billing_postcode'] );

    // Order fields
    unset( $fields['order']['order_comments'] );

    return $fields;
}
add_filter( 'woocommerce_checkout_fields', 'wc_remove_checkout_fields' );


function first_checkout_fields($fields)
 {
 $fields['billing']['billing_first_name']['placeholder'] = 'First Name'; 
 $fields['billing']['billing_last_name']['placeholder'] = 'Last Name';
 $fields['billing']['billing_phone']['placeholder'] = 'Phone';
 $fields['billing']['billing_email']['placeholder'] = 'E-mail';
 $fields['billing']['billing_postcode']['placeholder'] = 'Postcode';
 return $fields;
 }
add_filter('woocommerce_checkout_fields', 'first_checkout_fields');


add_filter( 'woocommerce_checkout_fields', 'wpbl_move_to_order_group' );
 
function wpbl_move_to_order_group( $array ){
 
 	$array['order']['billing_company'] = $array['billing']['billing_company'];
 	$array['order']['billing_state'] = $array['billing']['billing_state'];
    $array['order']['billing_country'] = $array['billing']['billing_country'];
    $array['order']['billing_city'] = $array['billing']['billing_city'];
    $array['order']['billing_address_1'] = $array['billing']['billing_address_1'];

    $array['order']['billing_company']['placeholder'] = 'Name Company (not necessary)';
    $array['order']['billing_state']['placeholder'] = 'Region / State';
    $array['order']['billing_country']['placeholder'] = 'Country';
    $array['order']['billing_city']['placeholder'] = 'City';
    $array['order']['billing_address_1']['placeholder'] = 'Address';

    return $array;
 
}
add_filter( 'woocommerce_checkout_fields', 'add_custom_select_country' );
function add_custom_select_country( $fields ) {
    $fields['billing']['billing_country'] = array(
        'type'      => 'select',
        'required'  => true,
    )
);
return $fields;
}