I'm deep into the Govee system for leaks and other products....BUT...to monitor my sump pump I use Yo-Link. A vibration sensor so I know when it is running, and their leak sensor to tell me if my pump has failed (IOW...the probe sits at a level that would never be reached if the pump is working as it should).
ETA: a photo...top is the sending unit, then there's a cord that runs down the outflow pipe and terminates at the sensor at the gravel. If water gets to the gravel, the pump is f'd