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 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 ?