@dingyichen I face this problem of Yeelight in the new Google Home app. When I go into the main display page of Google Home, it shows my Yeelights and I could turn them on/off.
But when I go into the individual Yeelight itself within Google Home app, it says the light is offline and I’m unable to turn on/off and set brightness.
It seems like there’s some integration issue. Can you please advise how to solve this problem? Thanks.