Yep, this is a new device and it is not supported even in HA, but I have found some info for a convertor of a very similar device here.
It partially matches one of the existing device profiles in this driver :
Enable the 'Advanced Options' in the Preferences tab and select the Device Profile to be ''TS0601 Fan Switch'
Then, pair the device again to your hub (withour deleting it).
Test whether the simple on/off commands are working, and whether setting the Level to 0,1,2,3,4 has any effect on the fan speed.
When you manually change the fan speed from the physical buttons on the device, is this reflected on the Level attribute?
