It does not work anymore on the newer ios. I have tried to do that on my iPhone 12, however it is not working. I have synced my iPhone to the iTunes app on my laptop, however it did not remove the analytics data instantly. I just do not understand how to do such a simple thing right now. I mean, it is just clearing the freaking Analytics Data, it is nothing that special! I have even read this entire article https://www.lupagedigital.com/blog/interpret-google-analytics-data/ about the google analytics data, hopping that I could find something helpful.