Earlier quoted context omitted.
I guess FB tracking pixels will no longer work when third-party cookies are removed from browsers. That seems like a massive hit for them if I understand it correctly (and a big W for us)
Yes and no. FB's tracking pixel can be both first and third party: https://www.facebook.com/business/help/471978536642445?id=12... Getting rid of third-party support will mean FB doesn't get anonymous data from random website users - but if you are logged into FB or hit the page from a FB link, it would still be trackable as a first-party cookie.
Btw, there is hidden Safari setting in iOS, under Advanced at the bottom, “Privacy Preserved Ad Measurement” that was on, for some weird reason. And check and purge Website Data periodically.
Oh, and use iCloud Private Relay. A must.