Apple is testing E2EE for RCS in iOS 26.4 Beta

TLS is not E2EE, this stackoverflow response explains better than me. TLDR; TLS can terminate encryption ant the centralized server and re-encrypt the message to your intended other end (your recipient). E2EE only allows the target recipient to decrypt, thus preserving message privacy from the middleman. For RCS E2EE, metadata is still leaked to your provider, as they know where you are routing your message to.