@State private var showSheet = false var body: some View { Button("show Sheet") { showSheet.toggle() } Spacer() .sheet(isPresented: $showSheet) { VStack { Text("this is Sheet") .font(.title) Button("close") { showSheet = false } } .presentationBackground(Color.white.opacity(0.8)) .presentationDetents([.medium]) } } } (sheet is full screen width on ios 18.6) (sheet is not full screen width)