A CA, and the time, effort, and energy to install and configure it, is likely worth more than the entire bike. That display provides a vaguely accurate voltage, NOT total power available, but ONLY voltage, meter, which can be replaced with something much, much better for $20. It also provides an on/off switch, which almost always simply connects two of the available wires, and an assist level, which, again, is almost always a simple connection between two wires. No connection is slow, A + B is medium, and A + C is high-speed, the vast majority of the time.
Search Amazon and Ebay for ebike display and you will find one that is compatible. Figuring out the wiring connector as you CANNOT RELY on the color coding, will be a bit of a challenge. Likely more so than connecting two pairs of wires.
Next most economical step would be to replace both the controller and the display with a matched set, selecting the controller for similar configuration. Sensored, sensorless, V and A limits, connector types, etc.
That type of display is almost universally capable of being totally bypassed.