User Age

Hello! I need advice. According to Apple's guidelines, is it permissible to ask users during the initial app launch, through an OnBoarding screen (example in the screenshot), if they are older than 16 when the Age Rating on the App Store is set to 9+? I want to determine if the user from Europe and the UK has reached the age of consent in order to display or not display the GDPR consent form to them. Thanks!