Right now in starfield outposts are just an incomplete feature. There is no reasonable sink for what you get out of them except a meager handful of delivery quests (I.e. a shipyard wanting 600 aluminum) and building more outposts.
I think because fast travel is so incredibly trivial and mandatory they sort of wrote themselves out of being able to have space trucking be a viable option. What we should see is raw ore selling for like 20x what it does today so that mining becomes economically viable... but then it'd just be a free money spout. The whole feature needs so much more fucking work.