No one wanted to create settings for the Thrustmaster T598 steering wheel in Forza Horizon 6 (Xbox Series X) that worked for me, so I had to do it myself...
Even though FH6 is an arcade game rather than a sim, it can be a lot of fun, however all the settings I found online made the steering wheel feel like it was submerged in butter. It was hard to get a sense of what the car was doing. It’s much better now, though still not perfect.
My FFB settings for the Thrustmaster T598 in Forza Horizon 6.
Steering wheel settings
FFB 3
Master 80 to 100%
Mode E
Inertia OFF
Boost Low +1
Boost High +1
Speed Mid
Wheel Damper 0%
Game Damper Gain LOW
Spring 0%
End stop MID
In-game FFB settings
Steering Axis Deadzone Inside 0
Steering Axis Deadzone Outside 100
Steering linearity 50
Acceleration Axis Deadzone Inside 0
Acceleration Axis Deadzone Outside 100
Deceleration Axis Deadzone Inside 0
Deceleration Axis Deadzone Outside 100
Clutch Axis Deadzone Inside 15
Clutch Axis Deadzone Outside 90
E-Brake Axis Deadzone Inside 10
E-Brake Axis Deadzone Outside 100
Vibration Scale 0,5
Force Feedback Scale 1.4
Center Spring Scale 1.2
Wheel Damper Scale 1.2
Mechanical Trail Scale 1.00
Force Feedback Minimum Force 1.2
Force Feedback Load Sensitivity 1.0
Road Feel Scale 1.0
Off-Road Feel Scale 0.7
Steering Rotation 720
Steering Lock Multiplier 1.00
Steering Speed Sensitivity 1.00