I created an app and submitted to app store for review and got a rejection with "4.3(a) - Design - Spam". This one was created for brand new, and I didn't find any similar apps in App store. I searched in this forum but am not sure if it is because I used flutter to build my app? How could I get a bit more specific detail why it got rejected?
Guideline 4.3(a) - Design - Spam
We noticed your app shares a similar binary, metadata, and/or concept as apps submitted to the App Store by other developers, with only minor differences.
Submitting similar or repackaged apps is a form of spam that creates clutter and makes it difficult for users to discover new apps.
Next Steps
Since we do not accept spam apps on the App Store, we encourage you to review your app concept and submit a unique app with distinct content and functionality.