Carrier profile updates can ship OTA without being tied to an iOS update. There is at least one case, that I know of, where a carrier held back RCS functionality on purpose up until an OTA carrier profile updates a few hours after the public 18.0 release (wasn‘t included in the final release, shipped OTA).Acknowledged. Now, did they? The final step of the update is to give the updated Mint carrier bundle with included RCS settings to Apple for them to add in their next iOS update. So is it there? They said in September it would take until "at least December."
Unsure but I think I remember reading somewhere that Mint changed their timeframe from December to mid 2025, due to the complexity of the rollout.