At 6 months your pup is in a critically important learning and development phase, so if in full day care you will want to make sure she gets the attention and 'on the spot' training needed throughout the day. Some day care centers might have staff to do this, but not all - you would need to thoroughly check out any care arrangement to make sure they can indeed do right by your pup in these important months. Have you thought of a private 'Hundehort' arrangement?
One place to look would be the Petsitting 24 website:
https://petsitting24.ch/fr?gclid=CNz...FYEV0wodqisJRA
Note that this is simply a platform to connect pet owners and care providers, nothing more. You are responsible for doing all the necessary due diligence when hiring.
You can browse for free, but in order to contact a sitter you need to pay a membership fee.
PLUS:
A full day doggy day care won't come cheap in central Zurich (unlikely) OR in Zumikon - especially if you need either collection/delivery and/or early/late drop off and pick up.