I decided to unlock my Fiido Q1S, from 25km/ to 60km/h, by using the popular VESC motor controller platform. Also I added my EScooter DIY simple board to interface with Fiido Q1S throttle and brake sensors, and it runs the firmware that implements the EScooter logic.
You can see the project page with my all technical build notes: OpenSourceEBike.github.io
DIY EScooter board schematic:
