I’m receiving messages RCS but then my reply is SMS

I noticed recently that with android users, I have been receiving their messages as RCS, with text bubbles being seen when they are responding, but then when I respond back, it sends as SMS.

I have tried resetting the RCS, I have completed closed and reopened the message app, I have turned off SMS, and I have turned my phone on and off.

I think it’s super strange that I’m receiving as RCS and can only send SMS. It shows that the RCS is working but I don’t know what else to do. Does anyone have a solution on fixing this.

I have a 13 pro, currently running on iOS 18.1 but about to update to beta 18.2