my wife and I want to share icloud storage, do we have subscribe for the 200gb?

Yes. Only 200GB and larger plans are shareable. See: Share an iCloud storage plan with your family - Apple Support

Also note the following from that link:

When you share a storage plan, your photos and documents stay private and everyone keeps using their own accounts with iCloud—just like when you have your own storage plan. You simply share the space available in the iCloud storage plan with your family members, so you only have one plan to manage.