Ubiqiti mFi motion sensor not included in component code

I successfully added mFi mPort sensor as described in documentation, and it reads only the current sensor (mFi-CS) connected to mFi’s port 1.
The motion sensor (mFi-MSC) connected to port 2 does not show anywhere.
Searching for a solution I found the source code for mfi.py under https://github.com/home-assistant/home-assistant/blob/master/homeassistant/components/sensor/mfi.py

It only shows the following sensor types:

SENSOR_MODELS = [
‘Ubiquiti mFi-THS’,
‘Ubiquiti mFi-CS’,
‘Ubiquiti mFi-DS’,
‘Outlet’,
‘Input Analog’,
‘Input Digital’,
]

None of the motion sensor models is listed (MSC and MSW).
Can you add support for those? What can I do to try to add it myself and see if it works?

I’m using Hassio (HassOS 1.13 and Hass.io supervisor 141).

Thanks!