There is a fault (see FaultState attribute)
The EV is not plugged in.
The EV is plugged in, charging is in progress, and current is flowing
The EV is plugged in and is demanding current, but EVSE is not allowing current to flow.
The EV is plugged in, discharging is in progress, and current is flowing
The EV is plugged in, but not demanding current.
The EVSE is transitioning from any plugged- in state to NotPluggedIn
See
MatterSpecification.v13.Cluster ยง 9.3.7.1