Ask HN: Facebook's Future and 3rd Party Cookies

As someone who owns a bit of Facebook stock (please don't shoot me!) I am interested in the company's future prospects. As we all know Facebook's main income comes from advertisers, and much of the information Facebook gathers on users comes from the infamous "Facebook Pixel" - a tiny iframe that websites around the internet plant that reports to Facebook (along with our data) whenever the page loads. This has worked wonderfully (for Facebook) until Apple recently started blocking 3rd party cookies on iphones. Google has announced plans of doing the same on Chrome yet so far it's been delayed. This has caused a serious drop in Facebook's share. While the IOS hit is big, Chrome doing the same can be disastrous as it has a huge market share.

Yet I ask - how hard is it for Facebook to gain this data (or similar?) with other means?. They already have a Conversion API - basically it's like a Facebook Pixel for the backend. So every shop/website that wants to use Facebook ads simply integrates this onto their backend (Afaik there are ready made integrations for Shopify shops etc, probably Wix/Squarespace/GoDaddy will have pre made integrations). Any serious advertiser that owns his own website infrastructure probably has someone technical enough to throw a few lines of code onto their server. Facebook can build integrations to the main web frameworks for example.

So in short - my theory is everything will be reported from the backend. The people who can't make the integration due to lack of technical knowledge are probably not big ad spenders anyway. As an investor it makes me think the market is being irrational or simply not understanding the underlying tech and how Facebook can navigate its way well enough.

What's your take?