Relaying from zuerich.ch team:
Another thing we saw on Data Commons timelines site which could be made more clear is the metadata labeling of the Zurich data. If you choose the city of Zurich and the canton of Zurich you can't tell them apart because it looks the same and shows always only the population of the city if both are selected. Is there a chance you could change the metadata so it's clear what timeline it's displayed?

(I am assuming this is a data issue but you could make the case it's a UI thing)