thanks for posting, i just did the same thing, hooked all the wires up
and then went to add it in the app and was like why is the setting not
here all the help files say this is possible (saying nest when they mean
nest learning), kind of bs. going t...
check if you already have an extra wire running to your thermostat, most
of the time the installer just leaves extra wires in the wall for this
exact reason