code do not save input in customer profile

Hi,
i hope this is the right forum to ask my issue.
i have some code for registration in Woocommerce to change a user_role and fii a conditional text field, but the code do not saving.
can somebody help me out?

First i make the new role

function uiwc_new_role() {  
  
  //add the special customer role
  add_role(
    'kundenkarte',
    "Kundenkarte",
    array(
      'read'         => true,
      'delete_posts' => false
    )
  );
}
add_action('admin_init', 'uiwc_new_role');

then the code for make selecting the checkbox and textfield

add_action( 'woocommerce_after_order_notes', 'custom_checkout_field_with_wholesale_option' );
function custom_checkout_field_with_wholesale_option( $checkout ) {

    if( current_user_can( 'wholesale_customer' ) ) return; // exit if it is "wholesale customer"

    echo '<style> #wholesale_card_field.hidden { display:none; }</style>
    <div id="wholesale_checkbox_wrap">';

    woocommerce_form_field('wholesale_checkbox', array(
        'type' => 'checkbox',
        'class' => array('input-checkbox'),
        'label' => __('Do you have a Customer Card?'),
        'placeholder' => __('card'),
        'required' => false,
        'value'  => true
    ), '');

    woocommerce_form_field('wholesale_card', array(
        'type' => 'text',
        'class' => array('hidden'),
        'placeholder' => __('Customer card Id'),
        'required' => true,
    ), '');

    echo '</div>';

    ?>
    <script>
    jQuery(function($){
        $('#wholesale_checkbox_field input').click(function(){
            if( $(this).is(':checked')) {
                $('#wholesale_card_field').css('display', 'none').removeClass('hidden').show();
            } else if ( ! $(this).is(':checked') && $('#wholesale_card_field').css('display') !== 'none' ) {
                $('#wholesale_card_field').hide();
            }
        });
    });
    </script>
    <?php

}

// Validation
add_action( 'woocommerce_checkout_process', 'wholesale_option_validation' );
function wholesale_option_validation() {
    if ( isset($_POST['wholesale_checkbox']) && isset($_POST['wholesale_card']) && empty($_POST['wholesale_card']) ) {
        wc_add_notice( __("Please fill in your customer card Id"), "error" );
    }
}

// Conditionally change customer user role and add customer card as order and user meta
add_action( 'woocommerce_checkout_update_order_meta', 'wholesale_option_update_user_meta' );
function wholesale_option_update_user_meta( $order_id ) {
    if ( isset($_POST['wholesale_checkbox']) ) {
        $user_id = get_post_meta( $order_id, '_customer_user', true ); // Get user ID
        if( $user_id > 0 ){
            $user = new WP_User($user_id);
            $user->remove_role('customer');
            $user->add_role('kundenkarte');
        }
        if ( isset($_POST['wholesale_card']) ) {
            update_post_meta( $order_id, 'wholesale_card', sanitize_text_field( $_POST['wholesale_card'] ) );

            if( $user_id > 0 )
                update_user_meta( $user_id, 'wholesale_card', sanitize_text_field( $_POST['wholesale_card'] ) );
        }
    }
}

Why is it not saving?

thanks