I've used the Google home app to integrate hubitat with Google home and it mostly works. I'm able to control switches and everything with my voice or google home app work perfectly.
The one annoying thing is that, activating modes, for example saying "activate night mode" works, but Google always tells me "Sorry, something went wrong for the Night Mode". I verified the mode actually changes in hubitat, and I don't see any errors in the hubitat logs. Not sure why google keeps telling me there are errors.