https://wccftech.com/apples-app-tracking-transparency-is-pushing-advertisers-to-target-android-users-instead/

Apple's App Tracking Transparency is available on iOS for a long time now. The framework basically asks users if they want apps to track their data and information across different apps and websites. While the feature was heavily criticized by companies that handle targetted ads, Apple made sure that the feature was made available to the public. Now, advertisers are spending significantly more money targeting Android users instead of iOS.

As mentioned earlier, Apple's App Tracking Transparency has pushed advertisers to spend more money targeting Android users instead of iOS. According to The Wall Street Journal, advertisers have lowered their spending on Apple's platform in favor of Android.