My father wasn’t much of a talker when it came to that sort of thing.
I made sure my wife has my passwords.
My sis has been able to find some of his passwords.
But not all
I don’t think it would work at all to talk with him about “for after you die.” She has to couch it as “since we’re your tech support, we might need your password to help you out.”
Your father didn’t need you as tech support.