Why is my showCupertinoModalBottomSheet not zooming out?

[Tristannos]

Normally in IOS you have that zoom out effect when the bottom sheet is opend.

For some reason i cannot find the reason why it is not working for me.

[SoMWbRa]

return CupertinoScaffold(
      body: Builder(builder: (cupertinoScaffoldContext) {
        return Scaffold(
          body: ... (
            // somewhere 
            onPressed: () {
                 CupertinoScaffold.showCupertinoModalBottomSheet(
                    context: cupertinoScaffoldContext,
                    builder: (context) => const MyOtherScreen(),
                 );
              },
          ),
        );
      }),
    );

[Tristannos]

Yes thankyou!!!