Zapier is an external platform. This means that your call data is sent to a program outside the My Rinkel platform. When you open Rinkel’s Zapier integration, you indicate that you are aware of this fact and that you understand it. This means that you are responsible for the call data sent to Zapier.
Zapier states the following about this "Customer Data".
For Zap Content (content transferred in and out of Zaps in your Zapier account), you, the customer, are considered the “data controller” of that data from a privacy perspective. In turn, Zapier is the “data processor” responsible for safeguarding Zap Content as it flows through Zapier’s systems. Zapier’s security measures are described in Zapier’s Security and Compliance page. As data controller, you are responsible for safeguarding Zap Content as you interact directly with services integrated with Zapier. You should configure your Zaps and integrations to not trigger or work with users' data without proper consent.