This is a glitch or a setting somewhere on Samsung’s. My wife’s note 8 has done the same, the status bar is gone and I can’t work out how to get it back on it either. It’s really annoying as so much information is lost and not easy to find because of this.I'm not sure there is a setting for that in stock android. Are you using nova launcher perhaps? If so, check out the settings under "look and feel", there is an option to show or hide the bar.
