Why is yulo tommorow absent from mooncrash?

I was thinking about this alot and alot of the tjings in mooncrash make sense from a gameplay perspective but i dont understand why they would put them in the crew tracker just as a reference..?

Its one body surely they could have added it. Alot of the fates of crew members in the original can be assumed. Marco simmons could have been on the shuttle for instance but ive seen nothing else even connecting this character to the plot