How is it possible to let the Apple Reviewers test an App which uses a App Configuration?

I developed an iPad app which can be configured by an Managed App Configuration. It is a private app for schools which is distributed via Apple School Manager and the chosen MDM solution of the different schools. I followed this tutorial (https://blog.eidinger.info/all-you-need-to-know-about-managed-app-configuration) and everything works as expected and I can test it on the simulator by using the command: xcrun simctl spawn booted defaults write com.example.tryouapp com.apple.configuration.managed -dict "myConfig" "someContent"

My problem is that the App is rejected from the Apple Appstore because the App Reviewer cannot test it with the App configuration. They always reply: "We need either a link to access via mobile safari to download the MDM profile to verify the functioanlty of the app, or a .config file to install the profile via Apple Configurator."

I checked the Apple Configurator but it is not possible to create a profile which sets a App Configuration for a certain app. The only way I know is to enroll the iPad via a MDM solution and then set the App Configuration via the MDM Inteface. But this would require me to buy a MDM solution only to let the reviewers test ist. The schools are using their own MDM solutions.

I'm already going back and forth with the app Reviewer for a month, but they won't supply me with any helpful information.

How is it possible to let the Apple Reviewers test an App which uses a App Configuration?

Is there a way to set an App Configuration via Apple Configurator for an app, that I overlooked? e.g. a App Configuration like this:

<plist>
  <dict>
    <key>myConfig</key>
    <string>someContent</string>
  </dict>
</plist>

Has anyone experience with this? How do you get your "App Configuration" School Apps tested by the reviewers?

Same here

How is it possible to let the Apple Reviewers test an App which uses a App Configuration?
 
 
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