Our app has been rejected for the following reason -
"Guideline 4.1 - Design - Copycats
Your app or its metadata appears to contain potentially misleading content. Specifically, your app includes content that resembles XYZ without the necessary authorization.
Please demonstrate your relationship with any third-party brand owners represented in your app."
In my case, there was an email with information about the cooperation with the company:
I, EmployeeName, representing BrandName, hereby confirm that we have collaborated with the developer, DeveloperName, to publish our app on Apple’s App Store.
I have attached this email and Apple confirmed the app.