Thanks for posting here in the Google Nest Community.
Yep — that’s correct. There’s no option to unlink the lights one at a time in the Google Home app. You need to unlink the account on the Google Home app where these lights are associated with. Then, open the native app and remove the light that you don’t want to use. Once done, go back to the Google Home app and relink your account. The light you want to control should appear in the Google Home app.
Let me know how it goes.
Thanks for posting.
It seems like you already created another thread about this concern, so I'll merge this with the main post so we can communicate effectively. You can follow the main thread for updates because this one will be locked automatically once merged.