This is not a bug report, but a request for information about the version numbering system. I see in the web that Grounded version 1.0 has just been released, along with a steady stream of patches (up to 1.0.5 at tine of posting). However, on my Xbox Series S, I have version 2.0.163.0 installed. I see no reference to this version on the Obsidian site, and only one hit on Google, which is tied to a performance complaint.

How do these version numbers correlate, and how do I ensure I have the latest patches on my Xbox?

You can find which version of the game you're running in the top right corner of the game's main menu.