While checking your app's settings on the App Store Connect Portal, you see a question regarding the use of IDFA by your app. This article explains why you should not select this IDFA option and how you can do that.
Note: Apple’s identifier for advertisers (IDFA) is a string of numbers and letters assigned to Apple devices like iPhones, iPad, and Apple TVs. Advertisers use the IDFA to identify iOS, iPadOS, and tvOS users across apps to deliver personalized and targeted advertising
You must not enable the Advertising Identifier option since this is not a feature included in the BiznessApps platform. Please follow the steps outlined below:
1. Log in to App Store Connect and click My Apps and locate the app you need to publish.
2. Under the App Store tab on the top, select the No, it doesn't in the question 'Does this app use the Advertising Identifier (IDFA)?'
3. Click Save on the top right-hand corner
4. (Optional) If you want to submit your iOS app for Apple Review you have to click then the Submit for Review button on the top-right hand corner.
If you choose to submit your app, once the submission goes through, you will not get a rejection because of a misconfiguration regarding the IDFA.