If you forget and turn it on from the Alexa app and the Google Home app
or a Google mini will not turn it off. You have to turn it on and off
from the Google Home app or Google mini.
I dug out my google minis and have been using them to turn the heat on
and off - if you forget and turn it on with Alexa then google home app
or a google mini won’t be able to turn it off.