Add “checkbox” to policy line. Woocommerce, Botiga theme-template

I would like to implement a checkbox icon, in the same way as the Botiga theme.

I’ve added a code snippet, and an additional checkbox "Policy terms" appears.

But I can’t figure out about the CSS, the checkbox is not visible.

I think the problem is here:

<input type="checkbox" class="input-checkbox woocommerce-form__input woocommerce-form__input-checkbox input-checkbox" name="privacy_policy" id="privacy_policy" value="1">

And it should be:

<input type="checkbox" class="woocommerce-form__input woocommerce-form__input-checkbox input-checkbox" name="privacy_policy" id="privacy_policy" value="1">

I don't know how to remove "input-checkbox" value class attribute.

Here is my code snippet:

add_action( 'woocommerce_checkout_after_terms_and_conditions', 'add_privacy_block', 9 );
function add_privacy_block() {
    woocommerce_form_field( 'privacy_policy', array(
        'type' => 'checkbox',
        'class' => array('form-row privacy'),
        'label_class' => array('woocommerce-form__label woocommerce-form__label-for-checkbox checkbox'),
        'input_class' => array('woocommerce-form__input woocommerce-form__input-checkbox input-checkbox'),
        'required' => true,
        'label' => 'Я прочитал и согласен с <a href="https://genreeds.ru/politic-conf/"><b>политикой конфиденциальности</b></a>',
    ));
}
add_action( 'woocommerce_checkout_process', 'privacy_checkbox_error_message' );
function privacy_checkbox_error_message() {
    if ( ! (int) isset( $_POST['privacy_policy'] ) ) {
        wc_add_notice( __( 'Вам необходимо отметить галочкой, что вы ознакомлены с политикой конфиденциальности' ), 'error' );
    }
}

Here is the linked page with this issue.

I can make a standard checkbox, but then I need to change the checkbox that comes with the theme above.

Probably easier to achieve that if that additional checkbox with the "botiga" is displayed?

I think the solution is very simple, but I don't have enough knowledge. Any help is appreciated.

Update:

Variant 1

If I add "label_class_disabled" to the snippet, then the checkbox appears. But he has a different design, standard.

Variant 2

Code the Policy checkbox

And here is how the checkbox code looks like that WORKS

The code of WooCommerce terms and conditions checkbox in Checkout page is located in terms.php WooCommerce template file.

On your main function, I have used a similar code for your "policy" checkbox, and I have changed a bit your other function too.

add_action( 'woocommerce_checkout_after_terms_and_conditions', 'privacy_checkbox_block' );
function privacy_checkbox_block() {
    $checkbox_text = sprintf( '%s <a href="%s"><strong>%s</strong></a>', __( 'Я прочитал и согласен с' ), 
    esc_url( site_url('/politic-conf/') ), __( 'политикой конфиденциальности' ) );
	?>
	<div class="woocommerce-privacy-policy-wrapper">
		<p class="form-row validate-required">
			<label class="woocommerce-form__label woocommerce-form__label-for-checkbox checkbox">
			<input type="checkbox" class="woocommerce-form__input woocommerce-form__input-checkbox input-checkbox" name="privacy_policy" <?php checked( false, true ); ?> id="privacy-policy" />
				<span class="woocommerce-privacy-policy-checkbox-text"><?php echo $checkbox_text; ?></span> <abbr class="required" title="<?php esc_attr_e( 'required', 'woocommerce' ); ?>">*</abbr>
			</label>
			<input type="hidden" name="policy-field" value="1" />
		</p>
	</div>
	<?php
}

add_action( 'woocommerce_checkout_process', 'privacy_checkbox_validation' );
function privacy_checkbox_validation() {
    if ( ! isset( $_POST['privacy_policy'] ) ) {
        wc_add_notice( __( 'Вам необходимо отметить галочкой, что вы ознакомлены с политикой конфиденциальности' ), 'error' );
    }
}

It should work now and be visible… The validation works too.