I did a couple of deckplans in Dungeondraft. I posted the Darvro-class here (on this site) a couple of months ago, and I’ve got my own take on the G9-Rigger too. They’re pretty rough because I haven’t spent a lot of time on them, but it should show that Dungeondraft can do the sci-fi setting justice with the right asset packs.
Asset Packs
This one by Zalkenai is specifically for Star Wars and has lots of good stuff.
Zalkenai also did this more general sci-fi one which is handy to have.
The full version of this one by Gnome Factory is Patreon only, but there is also a free sampler.
Whilst looking for these I’ve also discovered that there are lots more sci fi asset packs posted now and I’m heading down that rabbit-hole right now!