Dead Lambda Sensor?

I would like to ask how anyone can detect if their wideband lambda sensor is dead or malfunctioning? I'm trying to identify if a have a dead lambda or it still works!!!

mine start to respond slower and read a bit leaner when dying, yet when i suspect an issue i have a few vehicles i know what sort of afr they run and throw the sensors on those cars and see if the values are correct, also have multiple gauges and sensors on my dyno so can swap out sensors with a known good one and see if there reading the same

I have this lambda sensor on my car that I daily use and I'm experimenting with the AFR trying to get the best bang for the buck!