Supporting multiple fans

There are, but again it all comes down to the exact model of the existing fan and then what you want to use with it. Plus remember that in a smart thing set up it doesn’t have to be a Z wave controller for the fan, it can be a Zigbee one. The switch will communicate to the hub and then the hub will communicate to the other fan controller.

See the fan FAQ. Although the topic title mentions Alexa it’s the same solutions for any fan control.

FAQ: 2020 Ceiling Fan and Dimmer light wall mount control compatible with SmartThings and Alexa?