I've been using Tuya app with Google home for about 4 years with no problems. Since yesterday all my devices are offline in the home app although they works perfectly with Tuya. Other devices I have that works with Smart life and ewelink works fine in the google home app. Did google decide to ban out Tuya smart app?
I know how it feels when something isn’t working as it should, let’s get this resolved. Try to unlink and relink Tuya from your Google home app and see if it will make a difference. Here is a helpful link for you.
Keep me posted.