Hello there, @a_craik ...
It is my understanding that when the migration from the Jive platform to the Khoros platform (the software engines that run the Community site) happened back in August 2020, all users were reset to the same level. Since the two platforms were different, that also meant that not everything transferred over...including achievements, badges, etc.
I was informed today that a couple folks from the Documentation Team put together a blog posting, and it was just published to the Community. Instructure Community Rankings - Canvas Community
I hope that will be of some help to you. If you have more questions about that blog posting, feel free to post your comment there, and I'm sure someone will respond.
This discussion post is outdated and has been archived. Please use the Community question forums and official documentation for the most current and accurate information.