The iPhone will support RCS this fall when iOS 18 rolls out officially, something Apple confirmed during the WWDC 2024 keynote earlier this month. That wasn't a surprise to anyone following the RCS drama closely. Apple confirmed long ago that it would support RCS on the iPhone this year, thus ending the chat wars.
What was surprising was seeing RCS support get forcefully enabled in iOS 18 beta 1. Moreover, Apple rolled out iOS 18 beta 2 earlier this week, which supports RCS on iPhone without any hacks.