Checkbox in the woocommerce product loop

I need to create a checkbox in the product loop, where the user can check that they want to request a certificate. There is already a text field, where you can set the size of the product, there is also code for it that works. It also works on the product side. However, in the product loop, the value of the check box is always taken, but it should only be checked if the user has checked it.

function add_name_on_certificate_field() {
echo '<table class="certificate" cellspacing="0">
      <tbody>
          <tr>
             <td class="value">
              Certificate: <input type="checkbox" name="name_on_certificate" value="certificate" "/>                      
             </td>
         </tr>                               
      </tbody>
  </table>';}

add_action( 'woocommerce_before_add_to_cart_button', 'add_name_on_certificate_field'); 


 function save_name_on_certificate_field( $cart_item_data, $product_id ) {
    if( isset( $_REQUEST['name_on_certificate'] ) ) {
       $cart_item_data[ 'name_on_certificate' ] = $_REQUEST['name_on_certificate'];
       $cart_item_data['unique_key'] = md5( microtime().rand() );
    }
  return $cart_item_data;
}
add_action( 'woocommerce_add_cart_item_data', 'save_name_on_certificate_field', 10, 2 ); code here


function render_meta_on_cart_and_checkout2( $cart_data, $cart_item = null ) {
    $custom_items = array();
    if( !empty( $cart_data ) ) {
        $custom_items = $cart_data;
    }
    if( isset( $cart_item['name_on_certificate'] ) ) {
       $custom_items[] = array( "name" => 'Certificate', "value" => 
        $cart_item['name_on_certificate']);
    }
    return $custom_items;
 }
 add_filter( 'woocommerce_get_item_data', 'render_meta_on_cart_and_checkout2', 10, 2 );

  function certificate_order_meta_handler( $item_id, $values, $cart_item_key ) {
      if( isset( $values['name_on_certificate'] ) ) {
       wc_add_order_item_meta( $item_id, "name_on_certificate", $values['name_on_certificate']);
      }
  }
  add_action( 'woocommerce_add_order_item_meta', 'certificate_order_meta_handler', 1, 3 );


 function add_custom_fields_on_product_listing2() {
      global $product;
      echo '</a><div class="sark-custom-fields-wrapper">
          <input type="checkbox" id="name_on_certificate-'. $product->id .'" value="certificate-required" /> </div>';
}
 add_action( "woocommerce_after_shop_loop_item", 'add_custom_fields_on_product_listing2', 1 );


function inject_custom_field_script2() { ?>
     <script type="text/javascript">       
       jQuery(document).on("adding_to_cart", function( e, btn, data ){
        data["name_on_certificate"] = jQuery("#name_on_certificate-" + btn.attr( "data-product_id" )).val();
     return true;
    });
  
  </script>
 <?php }
add_action( "woocommerce_after_main_content", 'inject_custom_field_script2', 1 );