(Also submitted as FB19359821)
I suggest a PresentationDetent.sizeToFit or PresentationDetent.contentSize that automatically sizes the sheet to the height of the contained Views.
This seems to be a common requirement for many app developers and it would be nice if this would be supported out of the box without fiddling around with the usual GeometryReader in background -> make available the height with a preference key -> .presentationDetents([.height(…)]) workarounds.