"Facebook says Apple iOS privacy change will result in $10 billion revenue hit this year" (2022):

* https://www.cnbc.com/2022/02/02/facebook-says-apple-ios-priv...

See also perhaps "It’s not Meta - its APPLE who have screwed us small advertisers":

* https://www.reddit.com/r/FacebookAds/comments/1o85w2q/