I'm posting this here because the hardware with the problem are iPhone 12s - my wife's 12 and my 12 Pro. From what I've read we should automatically have a shared list added to the Reminders app, which we're both missing. Our daughter has the list on her iPhone X. I've spent an hour try to make it appear to no avail, does anyone have any experience with this list missing as well? And if yes what made it finally show up?