This is what is expected to happen when you remove a device from Google Home app in Hubitat (anyone is welcome to email me to say hi) ![]()
And this is what is expected to happen when you add a new device from Hubitat is selected. Note, there is no need to ask Google to sync lights or anything.
I suggest removing the app from Hubitat and unlinking the service from Google Home, then go to below post and make sure that Hubitat doesn't remain linked on Google side.

