No Notification Sound when is iPhone Locked
Very confusing, my wife was not getting sound Notifications if I texted her when her iPhone was Locked, however I was, this morning, but the difference was, I wasn’t wearing my Watch yet! Put my watch onand I also wouldn’t get sound when a notification came… Turns out to be a Watch setting, not iPhone! You can have one or the other, not not both! Turned it off for the Watch as it shows in this article, and that was the fix!