I have been Googling this to try and confirm - My understanding is Apple now reject apps using IDFA without actually serving Adverts. For the demographics feature of Google analytics the documentation says that IDFA collection must be enabled.
There are lots of articles around how the latest version of the Google analytics IOS SDK no longer requires the collection of IDFA by default.
To gather demographic data though - can someone please confirm if you still need to enable this option? Is it no longer possible to collect demographic data without serving ads using Google analytics?
Thanks heaps
When submitting the app, specify that you are using it to attribute campaigns served outside of the app. Works for us for over a year.