How to disable full screen in React Native for Windows + MacOs?

I need to set width and height(368px, 592px) and disable full screen in my app on React Native for Windows + MacOs.

I tried to add width and height to app.json but it didn't work.

//app.json
{
  "name": "Test",
  "displayName": "test",
  "width": "368px",
  "height": "592px"
}

Thanks!