I have 15 Xiaomi devices in Google home app that appear offline.
I cannot unlink them from mi home in the Google home app, as the option to unlink doesn't show up (mi home service appears as a service which is not connected yet).
If I try to set up the mi home service, it fails when trying to add the devices (''unable to put devices to your home'').
I uninstalled google home, cleared cache, deleted the home, the ghost devices still appear.
I tried to move them to a secondary home to make them disappear from my home, it doesn't work either.
I'm stuck with a frustrating issue and can't control my devices.
Sorry for the late reply. I wanted to follow up and see if I could be of any help. I found an article with some details. Please let me know if you are still having any trouble from here, as I would be happy to take a closer look and assist you further.