The authorities will try to notify someone in the immediate family (often the spouse). After that, if you are in their estate, the trustee should make a good faith effort to contact you. Beyond that, it’s normally just friends and family contacting each other.
Back in the days when printed newspapers were common, some folks would check the obituaries regularly.
You could create a Google alert. If the stupid thing actually works, you should get an email when their obituary gets posted somewhere.
I’m going to need a six-pack, please.