This may be resolved with a simultaneous connection of USB to the PC and CAN bus to the yoke controller. Mapping of the toe brake axis in the simulator or third-party controller software like vJoy, SPAD etc. is then possible via USB. Feedback control to the rudder pedal is transmitted via the CAN bus from the yoke.
A caveat to this is that the software axis reaches maximum value when the toe brake is depressed by 80% or so. I don’t understand this logic, except that the axis appears to be of some resolution greater than 14 bits but, not as high as 15 bits. Regardless of this axis behaviour, the toe brake function is perfectly acceptable using this configuration.