I'm able to link my xiaomi home account and my google assistant.
When i try, i got a error message that tell me this :
could not reach mi home, please try again.
Tried to reboot the phone, uninstall/reinstall Xiaomi home app and google home app.
It suddenly stop to work so i deleted the link between the 2 account and now i can't make the setup again, always the same error message.
Any tips please ?
Same problem in India as well, so it's a global issue. Also, during connection the Mi Home account login works successfully. Only the redirect back to Google Home is not able to read the success response from Mi. So seems like a Google bug. Please fix this issue soon as all Mi devices of so many people have become unusable for voice control.
Here is a way around it till they fix it
Open smartthings app and click on menu, then on the upper right corner click on the setting icon, then click Linked services then search for yeelight and add link it, it will use MI home account user name and password.
After yeelight is linked, connect or link google home with smartthings.
This worked for me in UAE