I updated to iOS 17.3, now I cannot search my calendar.
When I try to search my calendar, inquiries result in "No Results". I have noticed that this does not apply to all calendars. I have several calendars, but my main calendar (shared with my wife) and my private "work" calendar are not searched. Only two seldom used calendars are searched: a Japanese holiday schedule I subscribe to, and an NFL schedule calendar that I subscribe to. I have tried to turn calendars on and off, restarted my iPhone etc. These have no effect. I do not have this issue with my iPad.
iPhone 12 mini, iOS 17