Why are so many settings gone? Where is Label/Button radius setting?

Why are so many settings gone? Where is Label/Button radius setting?
The label/button radius are properties of the classic label and button controls.
Most likely, you've added the modern label and button controls to your screen and these do not include the radius property. If this is the case, if you add the controls from the classic section of the Insert menu, the radius setting should be available.