The size of GeometryProxy is different on iPad mini(6th generation)

I tried to display the screen of the app according to the screen width, but it seems that the size of geometry differs depending on the simulator.

Is there a way to get the correct size?

Target iPad mini pixcel width: 768 geometory pixcel width: 744

Others iPhone12 mini pixcel width: 375 geometory pixcel width: 375

iPad 9.7inch pixcel width: 768 geometory pixcel width: 768

iPad 12.9inch pixcel width: 1024 geometory pixcel width: 1024

iPhone8 pixcel width: 375 geometory pixcel width: 375

Code

struct ContentView: View {
 var body: some View {
  GeometryReader {GeometryProxy in
   Text("Hello, World!")
    .padding()
    .background(GeometryReader{ geometry -> Text in
      // size → frame
      print("******",geometry.frame(in: .global))
      return Text("")
    })
  }
 }
}

struct ContentView_Previews: PreviewProvider {
 static var previews: some View {
  ContentView()
 }
}