A concept using a jailbroken upside down iPhone X.
There are two tweaks that allow this concept to work. Gyration allows the device to be rotated upside-down. Another tweak called Notchless makes the device looks like there is no notch.
This looks very cool, but Gyration and Notchless are not meant to be used upside down, so it's very buggy.
Check out the reddit post on r/jailbreak here.