Vehicle aim - Razer tartarus Pro problem not fixed yet. Works fine in BF6 (beta)
By now EA, is well aware that Razer tartarus pro has a built in analog feature. By design BF2042 prioritizes the gamepad keystrokes over mouse in a certain bad designed way that causes issues.
For this reason, soldier movement and mouse input is interfered unless the related binds are cleared from the controller tab.
However; even after claring all gamepad inputs from the vehicle section, it is impossible to get it to register mouse movement for aiming as driver or machinegunner. Let alone all "workarounds" none work for vehicle aiming, and by now it is unnaceptable that EA has not fixed this bug.
Razer software is not to blame by any means, because during the BF6 Beta, all the inputs worked fine. The problem strictly relies in BF2042 code or way of handling the inputs because while as a passenger if the mouse is moved agressively, it will register as mouse movement skipping.