Yes, have been there and can say that where my relative was staying - voluntarily - there were visiting hours, you had to put all your items in a locker, and time was limited but you could visit with some degree of privacy in a common room.

Along with the contact I maintained via email with the social workers on the case, as well as a family meeting with the psychiatrist the relative had been meeting with to at least give an overview of what the relative was facing, (though it was quite a muted, measured discussion), there were a variety of opportunities to show concern, just be there, and listen.

I would hope you might find at least some of these outlets available to you and concerned family too.

Best wishes.