Terms and conditions checkbox mobile problem

Solved.

I had this code to add a Privacy policy checkbox to the register form (not the checkout register form):

add_action( 'woocommerce_register_form', function () {  
	$privacy_policy_url = get_privacy_policy_url();
	woocommerce_form_field( 'politica_privacidad_registro', array(
		'type'          => 'checkbox',
		'class'         => array('form-row rgpd'),
		'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'         =>  sprintf( __( 'I have read and agree to the website %s.', 'generatepress-child' ), '<a href="' . esc_url( $privacy_policy_url ) . '" target="_blank">' . __( 'privacy policy', 'woocommerce' ) . '</a>' ),
	)); 
}, 10);

And this to check if the field was selected:

add_filter( 'woocommerce_registration_errors', function ( $errores, $usuario, $email ) {
    if ( ! (int) isset( $_POST['politica_privacidad_registro'] ) ) {
        $errores->add( 'politica_privacidad_registro_error', __('-- Please read and accept the privacy policy.','generatepress-child') );
    }
return $errores;
}, 10, 3);

Now I have changed to this and it’s working:

add_filter('woocommerce_registration_errors', 'custom_registration_errors', 10, 3);

function custom_registration_errors($errors, $username, $email) {
    if (is_checkout()) {
        return $errors;
    }
    if (!isset($_POST['politica_privacidad_registro']) || intval($_POST['politica_privacidad_registro']) !== 1) {
        $errors->add('politica_privacidad_registro_error', __('Please read and accept the privacy policy.', 'generatepress-child'));
    }
    return $errors;
}