So, in doing KotFE, we recruit Torian Cadera and Vette. At a later point, we have to make a choice and one of them dies. My question is, can I recover the equipment the chosen one was wearing?

I had put some cool gear on Torian, but when he was killed off, I couldn't get the gear back.

Choice 1: open the Companions and Contacts panel and find the dead person in the list (down near the bottom, normally. There should be a little button to reclaim the person's equipment.

Choice 2: go to the Commander's room near Hylo Visz's area of the Odessen base. There you can find a terminal that can bring back dead or otherwise lost companions. Raise the dead, then recover the gear.