While this is currently only in Google's and Samsung's Messages apps, it's basically just the Signal protocol implemented as an RCS extension. It will most likely end up formalised in the next standard release of RCS.
RCS does include end-to-end encryption though. https://support.google.com/messages/answer/10262381
Maybe you could figure this out yourself, and share your findings, rather than demanding answers from others?
While this is currently only in Google's and Samsung's Messages apps, it's basically just the Signal protocol implemented as an RCS extension. It will most likely end up formalised in the next standard release of RCS.
RCS does include end-to-end encryption though. https://support.google.com/messages/answer/10262381
Maybe you could figure this out yourself, and share your findings, rather than demanding answers from others?