This article explains how to implement the 1€ Filter for filtering noisy real-time signals and provides a simple Python implementation of the algorithm.
I will mention 1 thing about this. Input plumber has conflicting functionality with steam input and can remap the controllers itself as well, which could cause confusion to users. Then, it also wraps every single controller in the system and in many cases (e.g., dualsense) currently disables advanced functionality such as gyro and leds