WhatsApp whitepaper removed sentence about never having access to private keys
So if I understand correctly, when a business uses WhatsApp, to maintain E2EE WhatsApp must "emulate" as if all customer reps of that business were sending WhatsApp messages through one phone. To do that, all reps connect to what is essentially one WhatsApp instance in a Docker container. This container holds the private key. And if a business tells Facebook to host that container, this means Facebook has possession of the private key?