Customisations in Custom Module is not taken in account.

I believe all you need to do is to make sure your service has a higher priority than EBs:

https://git.drupalcode.org/project/easy_breadcrumb/-/blob/2.x/easy_bread...

Hi All, Yes i am agree with Greg, You have to add high priority than module. I have done this before. I have added sample code for services.yml file.

custom_breadcrumbs.kenexa_jobs_breadcrumb:
    class: Drupal\custom_breadcrumbs\KenexaJobsCustomBreadcrumb
    arguments: ['@config.factory', '@path.current', '@path_alias.manager']
    tags:
      - { name: breadcrumb_builder, priority: 1004 }

Here you can see module use 1003 as priority if you will use 1004 than your code will work.

Hi @sandip27, I am attaching the code how it will work. In my past experience i have done the same thing. Where i created different file for each content type. please check below code once you will get your answer.

class JobsCampaignCustomBreadcrumb implements BreadcrumbBuilderInterface {
  use StringTranslationTrait;

  /**
   * The entity type manager.
   *
   * @var \Drupal\Core\Config\ConfigFactoryInterface
   */
  protected $configFactory;

  /**
   * The entity type manager.
   *
   * @var \Drupal\Core\Path\CurrentPathStack
   */
  protected $currentPath;

  /**
   * The entity type manager.
   *
   * @var \Drupal\path_alias\AliasManagerInterface
   */
  protected $pathAlias;

  /**
   * Constructs the SpecialPagesCustomBreadcrumb.
   *
   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
   *   The config factory service.
   * @param \Drupal\Core\Path\CurrentPathStack $current_path
   *   The current path service.
   * @param \Drupal\path_alias\AliasManagerInterface $path_alias
   *   The path alias service.
   */
  public function __construct(ConfigFactoryInterface $config_factory, CurrentPathStack $current_path, AliasManagerInterface $path_alias) {
    $this->configFactory = $config_factory;
    $this->currentPath = $current_path;
    $this->pathAlias = $path_alias;
  }

  /**
   * {@inheritdoc}
   */
  public function applies(RouteMatchInterface $route_match) {
    // Breadcrumb for 'jobs-campaign' pages.
    if ($route_match->getRouteName() == 'entity.node.canonical') {
      $node = $route_match->getParameter('node');
      if ($node->bundle() == 'jobs_campaign' && $this->checkForIgnoredPaths()) {
        return TRUE;
      }
    }
    return FALSE;
  }

  /**
   * {@inheritdoc}
   */
  public function build(RouteMatchInterface $route_match) {
    $breadcrumb = new Breadcrumb();
    $node = $route_match->getParameter('node');
    $breadcrumb->addCacheableDependency($node);
    $breadcrumb->addLink(Link::createFromRoute($this->t('Home', [], ['context' => 'breadcrumb']), '<front>'));
    $breadcrumb->addLink(Link::fromTextAndUrl($this->t('%title', ['%title' => $node->label()]), Url::fromRoute('<none>')));
    $breadcrumb->addCacheContexts(['route', 'url.path']);
    return $breadcrumb;
  }

I think whats wrong with you is, you are returning true in applies method. Try to add your content types condition in applies method rather then build method.