If you’re using Thrustmaster TCA Quadrant, you can follow the bindings that I have here. It works perfectly with every function in the A320 including the engines.
Rudder spasms can be caused by the TCA sidestick itself, a lot of the models are affected by this due to the way the internal wiring is done. It’s also fixable by opening up the case and redirecting the wires to keep it in place away from the twist axis sensors. You can follow how to do them here.