The encryption is also stripped when you back up your WhatsApp messages to Google Drive, along with a sweetheart zero-tier deal with Google to remove any possible downside that might make somebody think twice: https://faq.whatsapp.com/android/chats/about-google-drive-ba...

> WhatsApp backups no longer count against your Google Drive storage quota.

> Media and messages you back up aren't protected by WhatsApp end-to-end encryption while in Google Drive.