Yeah I ended up figuring it out over the weekend following similar steps to what you posted. Here is what worked for me:
Uninstall GHUB
Disconnect G923
Install LGS
Install GHUB
Connect G923
Load F1 2020
Run through Initial Setup of Wheel
I am having the same issue. Also, it always thinks the accelerator is at 100% unless you press it. So fully pressed down is 0%, not pressed is 100%. I am so frustrated that I am about to give up