When you install a game with Game Pass you can tell it what drive to install to. I think by default it might just install to your windows system drive but you can toggle that option in tho settings.
I installed Starfield to my F drive so it’s installed into something like: F:/XboxGames/Starfield. I then installed Vortex. Vortex did not automatically detect it but I just hit the button to manage it manually and directed Vortex to my F:/XboxGames/Starfield/Content directory… then it picked it up and I can install and deploy mods to it just like I can Skyrim or Fallout (which I have through Steam)
Folk are saying steal a ship to add to your fleet to get slot for a custom ship… you have to register a stolen ship before you can enter the ship builder but almost every cheap stolen ship I’ve ever captured has been 10k or 11k to register. I one time got like a level 4 ecliptic ship that was 9.8k to register but that was the cheapest. The ports sell ships for 6k - 7k. I also think the commerce perk gets them cheaper but I don’t know if it affects registration price at all. Don’t waste time pirating ships just to replace all the parts, just buy the cheapest ship. Best thing to do with most pirate ships, if you happen to have one is register and sell it to make a couple thousand credits.