To add to @Hariharan's answer, you need to add the Family Controls (Development) capability in XCode, runner. Otherwise, no data will be shown. This caught me off guard, since they don't tell you why nothing is showing otherwise...

If you use flutter, make use of rendering native views: https://www.youtube.com/watch?v=czErmevSbuY to render the ExampleView in his answer.

Good luck!