What is happening now with constraints in SwiftUI? Do View types adapt automatically for bigger devices etc. or what should we have to do
It still has constraint, in WWDC examples we saw HStack and VStack, which seems like UIStackView, so my guess it just clips to edges. You can still add padding to views so if you want constraint a UILabel (Text) 10pt to left you do something like this:
Text("Hello World").padding(EdgeInsets(top: 0, leading: 10, bottom: 0, trailing: 0))