my question is: how I must remove custom prompt.
Guideline 5.1.2 - Legal - Privacy - Data Use and Sharing
Do you ask in a custom alert about privacy ? If so remove it and replace by calling the standard API by testing permission.
Get more details here: https://stackoverflow.com/questions/63587364/how-to-add-the-apptrackingtransparency-permission-to-your-ios-apps