"Core Data has always had the requirement that the sort key must be stored in the database." Thanks eskimo, found this after trying to use a computed property in a swift extension as sort key in an objective C FRC! So after a few days of trying, I'll just go back to the original model...

I have the reverse problem. The app should be allowed in all orientations, but rotating the simulator rotates the view as well. (iPadOS26 only.)