overriding Third party module is not working in my Magento module

Question

I have created a new module in app code section, Its roll is to override the core file of a third party module, But its not working. Let me share my files app/code/Catwalk/TransitCover/registration.php

<?php
\Magento\Framework\Component\ComponentRegistrar::register(
 \Magento\Framework\Component\ComponentRegistrar::MODULE,
 'Catwalk_TransitCover',
 __DIR__
);

app/code/Catwalk/TransitCover/etc/module.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
 <module name="Catwalk_TransitCover" />
 <sequence>
 <module name="Amasty_Extrafee" />
 </sequence>
</config>

app/code/Catwalk/TransitCover/etc/di.xml

<?xml version="1.0" ?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
 <preference for="Amasty\Extrafee\Block\Sales\Fees" type="Catwalk\TransitCover\Block\Sales\Fees"/>
</config>

app/code/Catwalk/TransitCover/Block/Sales/Fees.php

<?php
namespace Catwalk\TransitCover\Block\Sales;
use Amasty\Extrafee\Block\Sales\Fees as AmastyfeeBlock;
class Fees extends AmastyfeeBlock
{
 
 public function addTotal($parent, $code, $taxDisplay, $feeAmount, $baseFeeAmount, $feeLabel, $feeOptionLabel)
 {
 $fee = new \Magento\Framework\DataObject(
 [
 'code' => $code,
 'strong' => false,
 'value' => $feeAmount,
 'base_value' => $baseFeeAmount,
 'label' => __('Transit Cover'),
 ]
 );
 $parent->addTotal($fee, 'shipping');
 }
}

This is all the content of this my developed module. Let me share the code of the file of which i want to overide AddTotal function

vendor/amasty/module-extra-fee/Block/Sales/Fees.php

<?php
/**
* @author Amasty Team
* @copyright Copyright (c) 2022 Amasty (https://www.amasty.com)
* @package Extra Fee for Magento 2
*/
declare(strict_types=1);
namespace Amasty\Extrafee\Block\Sales;
use Amasty\Extrafee\Model\ConfigProvider;
use Amasty\Extrafee\Model\ExtrafeeOrder;
use Magento\Framework\View\Element\Template;
use Magento\Sales\Block\Adminhtml\Order\Invoice\Totals;
use Magento\Tax\Model\Config;
class Fees extends Template
{
 public const FEE_CODE = 'amasty_extrafee';
 /**
 * @var ConfigProvider
 */
 private $configProvider;
 public function __construct(
 Template\Context $context,
 ConfigProvider $configProvider,
 array $data = []
 ) {
 parent::__construct($context, $data);
 $this->configProvider = $configProvider;
 }
 /**
 * @param Totals $parent
 * @param ExtrafeeOrder $feeObjectWithOrder
 * @return $this
 */
 public function getFees($parent, $feeObjectWithOrder)
 {
 $displayPrices = $this->configProvider->displaySalesPrices();
 $feeAmount = $feeObjectWithOrder->getTotalAmount();
 $baseFeeAmount = $feeObjectWithOrder->getBaseTotalAmount();
 $taxAmount = $feeObjectWithOrder->getTaxAmount();
 $baseTaxAmount = $feeObjectWithOrder->getBaseTaxAmount();
 $feeId = $feeObjectWithOrder->getFeeId();
 $feeOptionId = $feeObjectWithOrder->getOptionId();
 $feeLabel = $feeObjectWithOrder->getLabel();
 $feeOptionLabel = $feeObjectWithOrder->getOptionLabel();
 if ($feeAmount >= 0) {
 if ($displayPrices == Config::DISPLAY_TYPE_BOTH) {
 $code = self::FEE_CODE . '_excl_tax_' . $feeId . '_' . $feeOptionId;
 $this->addTotal($parent, $code, '(Excl.Tax)', $feeAmount, $baseFeeAmount, $feeLabel, $feeOptionLabel);
 $feeAmount += $taxAmount;
 $baseFeeAmount += $baseTaxAmount;
 $code = self::FEE_CODE . '_incl_tax_' . $feeId . '_' . $feeOptionId;
 $this->addTotal($parent, $code, '(Incl.Tax)', $feeAmount, $baseFeeAmount, $feeLabel, $feeOptionLabel);
 } else {
 if ($displayPrices == Config::DISPLAY_TYPE_INCLUDING_TAX) {
 $feeAmount += $taxAmount;
 $baseFeeAmount += $baseTaxAmount;
 }
 $code = self::FEE_CODE . '_' . $feeId . '_' . $feeOptionId;
 $this->addTotal($parent, $code, '', $feeAmount, $baseFeeAmount, $feeLabel, $feeOptionLabel);
 }
 }
 return $this;
 }
 /**
 * @param Totals $parent
 * @param string $code
 * @param string $taxDisplay
 * @param float $feeAmount
 * @param float $baseFeeAmount
 * @param string $feeLabel
 * @param string $feeOptionLabel
 */
 public function addTotal($parent, $code, $taxDisplay, $feeAmount, $baseFeeAmount, $feeLabel, $feeOptionLabel)
 {
 $fee = new \Magento\Framework\DataObject(
 [
 'code' => $code,
 'strong' => false,
 'value' => $feeAmount,
 'base_value' => $baseFeeAmount,
 'label' => __('Extra Fee %1: %2 (%3)', $taxDisplay, $feeLabel, $feeOptionLabel),
 ]
 );
 $parent->addTotal($fee, 'shipping');
 }
}

I tried almost everything, not not working for me. Please give me any idea here.

Answer 1

In the app/code/Catwalk/TransitCover/etc/module.xml, change:

<module name="Catwalk_TransitCover" />
<sequence>
 <module name="Amasty_Extrafee" />
</sequence>

to

<module name="Catwalk_TransitCover">
 <sequence>
 <module name="Amasty_Extrafee" />
 </sequence>
</module>

Answer 2

change the code of this file like this.

app/code/Catwalk/TransitCover/etc/module.xml

<module name="Catwalk_TransitCover">
 <sequence>
 <module name="Amasty_Extrafee" />
 </sequence>
</module>