I think @Andi_archer is on the right track here.
The entire setup is several computers working together. If it all used to work in the past, the software as such is working. An software update does not hurt, but as it used to work prior to upgrade, the problem is to be found elsewhere.
All the signals from each handlebar are collected and shipped to the ZFE in one batch, thus if any of the other switches on the left side are working, the signal track is ok. The signals are decoded in the LIN bus receiver and shipped to ZFE, and ZFE publish all movements of any switch onto the CAN-bus, where, among others, the signals are monitored by the Denali.
The GPS is connected directly to the ZFE, so, if everything else is working, the problem most likely is to be found in this path, as suggested by Andi.
If the wheel works as it should and operates the Denali, you know that all signals between Wheel and ZFE are ok. Then the issue is to be found between ZFE and GPS. If the Denalis does not react to the wheel either, but reacts to other inputs, there might be a problem inside the wheel. The wheel holds it's own electronics such as a voltage regulator and hall switches.
my 2c