Can you offer some examples, besides financial accounts, of things that a person would prevent others from accessing while alive and grant access upon death? In sifting through the list of things in my password manager, none of them (besides finances) seem to have this quality. Seems like anything that should be seen by family after death could be seen by them before death as well.

Social Media accounts with private DMs are the first to pop in mind. Cloud storage like Dropbox/iCloud/Drive/etc. Lots of things really if you thing on it for just a minute or so

If someone DM'd me, they were probably expecting me to not share what they said. If I have stuff in cloud storage that could be useful to others, I'll share it now.

I'm sure there are use cases, but it's actually very hard for me to think of them, let alone in just a minute or so.