@BeAware i guess you can't go back! according to rando on macforums anyway https://forums.macrumors.com/threads/ios-18-1-beta-1-bug-fixes-changes-and-improvements.2432473/post-33288072
i bet it's possible - but you might need to completely restore the phone from an ipsw - may not be avail in the nice droppy downny new update ui