You want the good news or the bad news? The good news is that Starfield Shattered Space is now available across Xbox Series X|S and PC, but the bad news is that it's suffering from a pretty turbulent launch so far.
We're seeing all kinds of issues cropping up for Shattered Space players right now, with the biggest one being something called a "Lookup Failed" error. When they try to start the Shattered Space DLC, they're presented with a planet that has no texture to it, and the writing alongside it says "Lookup Failed". Here's an example:
So, what's the answer? Well, there are a few fixes players have suggested, such as restarting your console (or PC) completely to force any additional updates for Starfield and/or the Shattered Space DLC, as well as turning off any mods that might be installed to your game. Unfortunately though, these don't seem to work for everyone.
There's also the problem that not everyone is running into this "Lookup Failed" issue in the first place - some are simply finding that when they go to start the Shattered Space DLC, nothing happens. Again, we haven't come across a guaranteed fix for this right now, but restarting your system is your best bet in the first instance.
Hopefully this won't last long, but yeah... you're not alone if you're getting any of these problems so far!