Hello
Since I read this https://9to5google.com/2025/01/13/google-messages-dual-sim-rcs/ , I wanted to see if something changed in my Google Messages app on GOS and effectively, my two operators appear now ! I can check RCS for both in the settings.
(I don't know if my phone numbers will activate though. I have one in roaming and it says that they can't validate it when roaming. I am still waiting for the other.)