I think arduino must cooperate with google to develop board which can be conected to google home :)
to develop own smart home devices which can be compatible with google home ecosystem
There are lots of projects out there that interface with a variety of alexa and similar devices in a multitude of ways.
Maybe let Google be YOUR friend (https://www.google.ca/search?q=google+home+arduinbo&rlz=1C1NHXL_enCA761CA762&oq=google+home+arduinbo&aqs=chrome..69i57j0l5.6863j1j7&sourceid=chrome&ie=UTF-8) in finding them.
Arduino has at least 4 devices that are IOT ready.
And making non IOT boards work with IOT is being done all the time.
Ditto with the Amazon Alexa -there are projects about , plus lots of information on how to do this from Amazon; isnt that right Alexa ?