ConsumerStateless Widget does not rebuild after Changenotifier changed

[KevinCCucumber]

I have a changenotifier in a stateless widget. This widget contains a switch that should reflect the current setting, wich it does. However, toggling the setting via the switch does not trigger a rebuild of the widget at all.

To my understanding, ref.watch should rebuild the widget if anything changes. ( And the notifier sends a signal)

Why does my state not change?

This is my Settings provider:

final settingsProviderState = StateProvider<Settings?>((_) => null);

ChangeNotifierProvider<Settings> settingsNotifierProvider = ChangeNotifierProvider<Settings>((ref) {
  final settingsInstance = ref.watch(settingsProviderState);
  return Settings(settingsInstance!.prefs);
});

These are my getter and setter Methods:

bool getShowBirthdays() {
    return (prefs.getBool('showonlybirthdays') ?? false);
  }

  Future<void> setShowBirthdays(bool value,
      {bool notify = true}) async {
    await prefs.setBool('showonlybirthdays', value);
    if (notify) {
      notifyListeners();
    }
  }

And this is the code calling it:

class DashboardEvents extends ConsumerWidget {
  const DashboardEvents({
    super.key,
    required this.currentEvents,
  });

  final List<SeasonEvent> currentEvents;

  @override
  Widget build(BuildContext context, WidgetRef ref) {
  // I subscribe here every build cycle: ++++++++++++++++++++++++++++++++++++++++++++++
    final Settings settings = ref.watch(settingsNotifierProvider);
    final ThemeData themeData = themeManager.themeData();
    final Localization localization = NookLocalization.of(context)!;
    return Display(
      title:
          '${localization.dashboardEvent}: ${settings.getProfilesetting(profileProperty: name, id: activeObjectid)}',
      children: [
        // Mode Settings
        Container(
          padding: const EdgeInsets.symmetric(horizontal: 4),
          decoration: BoxDecoration(
            color: themeData.primaryColorLight,
            borderRadius: const BorderRadius.all(Radius.circular(10)),
          ),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Flexible(
                  child: Text(localization.filltexthere,
                      softWrap: true, style: themeData.textTheme.bodySmall)),
       // This does change setting but not trigger rebuild ++++++++++++++++++++++++++++++++++
              Switch.adaptive(
                  activeColor: themeData.primaryColor,
                  value: settings.getShowBirthdays(),
                  onChanged: (value) {
                    settings.setShowBirthdays(value);
                  }),
            ],
          ),
        ),
        const SizedBox(
          height: 5,
        ),
        /* rest of the build method*/
      ],
    );
  }
}