MoreHelpPageTestHooks.php

<?php

declare (strict_types=1);
namespace Drupal\more_help_page_test\Hook;

use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Hook\Attribute\Hook;

/**
 * Hook implementations for more_help_page_test.
 */
class MoreHelpPageTestHooks {
  
  /**
   * Implements hook_help().
   */
  public function help($route_name, RouteMatchInterface $route_match) : ?array {
    switch ($route_name) {
      // Return help for the same route as the help_page_test module.
      case 'help_page_test.test_array':
        return [
          '#markup' => 'Help text from more_help_page_test_help module.',
        ];
    }
    return NULL;
  }
  
  /**
   * Implements hook_help_section_info_alter().
   */
  public function helpSectionInfoAlter(array &$info) : void {
    $info['hook_help']['weight'] = 500;
  }

}