Provide service aliases for autowiring

Thanks @dieterholvoet ... for providing all this.
Not yet (super) clear to me what all this is already achieving or is setting to make the module ready to achieve,
thus I will need to better go through the parent reference: https://www.drupal.org/node/3218156 →

But one question from now. Is it not needed the autowire: true to enable autowiring, as mentioned inside that?

It allows other (custom) modules using services provided by this module to be autowired. It's not required for this module to use autowiring, that would only be possible if the module only supports Drupal 9.3.0 or higher.