No, the Ferrari 488 GT3 Wheel Add-On is not directly compatible with the Thrustmaster T598. The steering wheel is compatible with older Thrustmaster bases such as T300, TX, T-GT, T-GT II, TS-XW, TS-PC and T818, but not with the T598 base.
If it's compatible with the T598, I don't know where Galaxus gets its information... And if it's compatible with the PS5, it's compatible via the servo motor...