I propose a support for iphone (5/5S/SE) for the scooter xiaomi M365. This support is quite simple but effective.
It is positioned above the central gallows and is divided into two parts that come clipped together. The support allows access to the power button and lets you see the battery level when the phone is not fixed.
The support is slightly shifted to the right to avoid having to remove it when folding the scooter.
The support size was calculated with an iphone 5S in a transparent thin case about 1mm thick. Depending on the thickness of your case, it is possible to modify the size of the top object in the slicer to adapt it.
EDIT : I've extended about 5mm the base support to fit better and don't move.
Supports are only needed for the space left access to the iphone buttons