No host port mapping after creating container

I noticed when creating a new MySQLContainer like so

protected function setUp(): void
{
      $this->container = MySQLContainer::make();
      $this->container->withMySQLDatabase('pimcore');
      $this->container->withMySQLUser('pimcore_user', 'pimcore');
      try {
          $this->container->run();
      } catch (JsonException $e) {
          $this->fail($e->getMessage());
      }
}

but when checking out the docker container with docker ps and docker inspect there is no port mapped to the host (localhost). And then when I try to connect to it like so

$this->pdo = new PDO(
      sprintf('mysql:host=%s;port=3306', $this->container->getAddress()),
      'pimcore_user',
      'pimcore',
);

host missing when inspecting the container

"Ports": {
      "3306/tcp": null,
      "33060/tcp": null
},

I get this timeout error

1) Tests\App\journey\ContactIntegrationTest::testGetAllAction
PDOException: SQLSTATE[HY000] [2002] Operation timed out

here the container in Docker Desktop

Start with MySQLContainer::make(), run(), and getAddress(), then compare the container's Docker port configuration with the reported docker inspect output. Reproduce the PDO connection using the shown setup and verify the expected host and port mapping; the issue is done when the container can be reached from the host without the timeout.