I wanted to try out the game outside of the main story and so I started a sandbox game.
I choose to take the Crust full payment option, the one that gave $350k, 12 drones, 150 blue and orange research and a few other things. During the game play I ended up never getting a lunar rover (or any form of transport) to be able to do any expeditions as well as never received any source of the green research which leads to a point of being soft lock in the sandbox mode.
No green research means unable to learn any of the Social stuff as well as any of the other research items that require it in the other sections. In addition the initial 150 blue and orange research runs out and I am unable to find a way to get more. From what I remember about playing the story mode, you get all 3 from doing the expeditions from the global tab in game with the transports.
attached is a screen shot of the global map trying to show that there is "No Transport Available"