How to blacklist properties on flutter?

[Cotspheer]

How can I opt out of certain properties on Flutter? I found something for javascript that, as it seems, does not work on Flutter: Block-Default-Mixpanel-Properties. Property names from here What-properties-do-Mixpanel

Used package: mixpanel_flutter: ^1.6.0

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Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 3.0.5, on Microsoft Windows [Version 10.0.19043.1526], locale de-DE)
[√] Android toolchain - develop for Android devices (Android SDK version 32.0.0)
[√] Chrome - develop for the web
[√] Visual Studio - develop for Windows (Visual Studio Community 2022 17.2.3)   
[√] Android Studio (version 2021.2)
[√] VS Code (version 1.70.0)
[√] Connected device (4 available)
[√] HTTP Host Availability

• No issues found!

That's my code:

      this._mixpanel = await Mixpanel.init(
        appConfigBloc.state.privatConfig.mixpanelApiKey,
        optOutTrackingDefault: !preferences.state.usageCollectionEnabled,
        config: {
          "property_blacklist": [
            '\$browser',
            '\$initial_referrer',
            '\$carrier',
            '\$radio',
            '\$wifi',
            '\$bluetooth_enabled',
            '\$bluetooth_version',
            '\$has_nfc',
            '\$city',
            '\$has_telephone',
          ],
        },
      );

      this._mixpanel!.setServerURL("https://api-eu.mixpanel.com");

But mixpanel still gets carrier and other not required information. So how do I set this on Flutter? This is mission critical for being compliant with laws of the EU and Switzerland as we only can - and want - track properties that are necessary to improve our service or we need to fix technical issues.

Also I can't drop the properties from lexicon as stated here: dropping-events-and-properties

Thanks in advance for any help!