Hi,
For any future people that may come across this issue, and find the solution as annoyingly hard, yet simple to find. This was my fix.
Control Panel > View device and printers > "racing wheel" (mine has an xbox controller icon) > Right click - Game controller settings > Properities > Settings > Calibrate. I then followed the instructions.
(You will find that turning the wheel, one of the axis doesnt reset to middle, i just full locked the wheel a few times and it reset.
I believe this will fix your issue,
Just incase, i also deleted all saved data from FM20, did a fresh install of LogitechG hub, and verifyed my game files, pre doing this calibration, just for the matter of similarity.
Thank you me for finding the solution.