Coco and Rico is no longer open. There is a new restaurant at 3 Dalpozzo with different hours and food in Nice. I think Isabella may still be there but do not know for sure as it was closed with a new name. We asked a neighboring restaurant and if we understood correctly she is still running the trstaursnt under the new name with new hours/ days of operation.
Thanks for your post. There is already a notification about the closure in the guidebook updates section of this website.
I did not see the city of Nice listed in the updated.
It's under French Riviera.