I have a problem I have an iphone 12 and iOs 18 and when I go into settings and click on screen time it crashes my settings
If the Settings app is crashing when you navigate to the Screen Time section, this sounds like a potential bug in the iOS 18 beta release.
As for all bugs in beta releases, could you file a bug report using Feedback Assistant so that the issue is routed to the correct engineering team, and then post the bug number back here for reference?