I'm on Amaysim which uses Optus network and my RCS was turned on half an hour ago. I received a text from friend and when I opened the app it said your messaging has got better. I'm currently using a pixel 4 xl in single sim mode on Android 11. On chat feature screen it says "chat features from Google provided by jibe mobile". Anybody else got their RCS activated on optus network?
Few people on Optus has confirmed RCS working on their phone since last night on Whirlpool "RCS Messaging" thread. Even Telstra RCS is not working for many users after 15/10/20 and people who got their RCS disconnected were connected again yesterday and today on Telstra. Looks like google is rolling out their RCS gradually to the users regardless of the network maybe.
I don't think Optus is implementing it this. Jibe mobile RCS is Google's own RCS. Just wait for a bit because they usually do staged rollout. A week or two doesn't hurt where we have waited so long. Just make sure you have up to date Google messages and carrier services app on your phone