The current mill integration has a service to SET the temperature setpoint on room level.
It would be nice to also be able to GET the temperature setpoint on room level.
Now it is only possible to get the temperature setpoint of individual devices, not for rooms.
It seems like the Mill Integration references pymill library.
The referenced pymill library implements a method for getting the room state, and this includes all setpoint temperatures (comfort, sleep and away): updateRooms()