FileServiceProvider.php

<?php

namespace Drupal\file;

use Drupal\Core\DependencyInjection\ContainerBuilder;
use Drupal\Core\DependencyInjection\ServiceModifierInterface;
use Drupal\Core\StackMiddleware\NegotiationMiddleware;

/**
 * Adds 'application/octet-stream' as a known (bin) format.
 */
class FileServiceProvider implements ServiceModifierInterface {
  
  /**
   * {@inheritdoc}
   */
  public function alter(ContainerBuilder $container) {
    if ($container->has('http_middleware.negotiation') && is_a($container->getDefinition('http_middleware.negotiation')
      ->getClass(), NegotiationMiddleware::class, TRUE)) {
      $container->getDefinition('http_middleware.negotiation')
        ->addMethodCall('registerFormat', [
        'bin',
        [
          'application/octet-stream',
        ],
      ]);
    }
  }

}