Is there an official hierarchy of project managers in project management?
Not really, although some organizations will have Project Manager 1, Project Manager 2, etc. Some will have Project Manager, Senior Project Manager etc. The more experience you have, the bigger the projects you’re likely to run (and/or the projects with more risk.)
In some organizations the term program manager is used to refer to someone that manages a group of related projects, with a project manager in charge of each project. The term portfolio manager can also be used to describe a manager of project managers.
Some organizations might also have a Director or VP of Project Management.