looks like rendering adblockers extensions obsolete with manifest-v3 was not enough so now they try to implement DRM into the browser giving the ability to any website to refuse traffic to you if you don't run a complaint browser ( cough...firefox )
here is an article in hacker news since i'm sure they can explain this to you better than i.
and also some github docs
I mean Google has very convenient libraries that developers can add to their apps/websites like libraries for ads, A/B testing, crash reporting, push notifications, etc. Even using one's Google account for SSO in an app just leaks a tiny bit of data for Google to suck up. I think the average phone user is unaware of how even non-Google apps can have Google code, even for iOS. Obviously, this is worse for Android since Google Play Services is installed on almost all Android devices.