Even though it is not the foldable phone everyone is waiting for, Nubia's Z18S still comes with a dual-display setup. The front screen has no notch or selfie cam, so the bezels are as thin as they can get. The secondary screen is placed on the back, under the camera setup and it can be used to display, notifications, widgets or headlines.
https://www.notebookcheck.net/Nubia-Z18S-leaked-pics-reveal-dual-display-no-notch.313544.0.html