This is how I found out a couple of my old acquaintances had passed. I searched them up and found their death notices.
On the other hand, I have a friend with whom I made a pact to notify our respective families if we start to go down because we care but are not in regular contact.
My closest circle reflects the prevailing view here on Lemmy. I don’t go out much so the only other people I’ve interacted with are people who work in the same fiefdom that I do so no one mentions it.