https://www.spiegel.de/international/business/whatsapp-ceo-on-the-controversy-surrounding-proposed-german-communications-laws-a-2e6f4c52-4a39-4117-8199-1606e1f3ac87

Cathcart: Let me be very clear: We cannot read your messages, we cannot listen to your calls. When you send your location over WhatsApp, we do not know where you are.

DER SPIEGEL: But you do save data about your users like the device ID, the phone model, the WhatsApp user name, the phone book and thereby also the numbers of all their contacts, right?

DER SPIEGEL: Apple has recently introduced privacy labels that resemble nutritional labels about what kind of data an app collects and what it doesn’t. Why don’t you do something similar?

DER SPIEGEL: A new German law, if passed, would mean that WhatsApp would have to hand over account data to law enforcement. Do you hand over data about your customers to government agencies?

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more on WhatsApp in this IMS blog
https://blog.stcloudstate.edu/ims?s=whatsapp