Just bought and plugged in a wired PS-style dual-shock controller. Can anyone provide some feedback or guidance on my issue?

Performed the Windows 10 calibration and at the same time manually confirmed that all keypresses are recognized, both axes for both thumbsticks ("TS") are recognized, and both TS-presses are recognized. The RTS recognizes in Windows 10 joystick calibration widget, and Steam's own calibration widget, and BOTH successfully manage to interpret the inputs -- but this game, specifically, seems to be blind to the RTS.

In the FS19 CONTROLS menu from the main screen (have NOT loaded a save yet) won't seem to accept a right-thumbstick ("RTS") axis input, whether vertical or horizontal. TS-press inputs seem to be recognized within the game, but no RTS left-right "Z Axis" or up-down "Rotation" labeled in quotation marks according to how Windows 10 differentiates the two analog = axes of the RTS. This is all agnostic to the specific control I'm trying to set to a keybind / it seems to be game-wide global issue. I.e., attempting to temporarily assign RTS to any of several attempted other keybinds at random seems to present the same issue that, as far as the keybind-setting menu is concerned within FS19, there exists no RTS and in its place is a mere toggle button.

For troubleshooting, I set the game to windowed mode to share the laptop screen with the Windows10 joystick calibration tool. That tool clearly shows that Windows is receiving up-down and left-drive movement data from the right-thumbstick but the game itself is either not receiving the input OR is receiving the input without either recognizing or at least throwing a possible exception error.

Is this a known thing? Is there a workaround?