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Delete these messages.
Select photo (or file, when P2P connected).
Device location in Google map.
Message Storage, Privacy & Security
messages are encrypted the moment they are posted and stay that way under transport, relayed via the webserver or direct to the P2P-connected device.
Not P2P connected
Without P2P connection, encrypted messages are relayed via the webserver, then deleleted upon collection. (In active chat session, typically 1 - 2 secs).
("In a Call")
When P2P connected, true end-to-end encryption secures voice / video and message data over webRTC
peer-to-peer connections, directly between devices.
messages are stored encrypted on the devices they are created/received on, not
on the webserver. Messages can be deleted individually, and entire conversations can be deleted on each device.
Since webRTC connects browsers together in temporary private networks, there is no webserver in the middle and therefore no way the messages can be read by any third party.
Of course, for this to work, the web browsers must be connected peer-to-peer and the data channels established, typically done by connecting in a video call - the most secure encrypted messaging application imaginable, privacy protected by the very nature of the technology.