Hi,
According to your post, my understanding is that you have an issue about the App Licence.
As you have known, the issue is related to the App licence, the best suitable forum is
Publishing Apps for the Office Store.
However, for this issue, I recommend you can create a simple app, then submit to SharePoint app store to check whether it works.
This method would narrow down whether the issue is related to your app or the app store.
Thanks,
Jason
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