Provide a month/agenda calendar where reminders can be drag-dropped to change due dates quickly.

Apple added this in iOS 18 by exposing reminders in the calendar app.

Its funny–way back in the day reminders used to show up in calendar. It was removed when Apple moved from CalDav standards to iCloud syncing, and now YEARS later, we are back to what we used to have. This was a case where the Apple Way (iCloud) regressed functionality when compared to an open standard.