The friend without nearby family still deserves someone who knows the practical details in an emergency.

Emergencies run on information that lives with the people closest by. Which medications, which door key, which surgery, who to call at work, whether there is a cat expecting to be fed: families usually hold this without ever discussing it, and someone far from their relatives may have nobody holding it at all. The gap is invisible until the day it matters.

Offer to be that person for a friend who is far from family, and let them do the same for you. Exchange the boring facts and write them somewhere findable.