Manufacturers don’t make displays under 6 inches available for purchase, with special cases (such as the iPhone Mini) being made under exclusive contracts. The best lead they have so far is to try to use displays designed for the front part of a foldable phone, but they’re yet to strike an agreement.
TIL that display manufacturers are also part of the reason why we aren’t getting small phones and why it’s probably even harder for manufacturers like Fairphone to make them.
Which is why Android very seldom puts stuff in the far top left corner and if it does, it’s the back arrow, which you can and should avoid by just using the universal back action via either gestures (my favorite), the on screen button, or the physical button if you have one.
Material design is pretty much about moving shit away from the top and especially lop left to the bottom