So the government wants "structural relief" here meaning to break up Google. But isn't the remedy simply tp make such payments illegal? That's certainly one argument I would make were I Google's lawyers. In addition to just appealing the finding outright of course.
Now I've previously said (and I stand by this) that making such payments illegal would help Google maintain its search dominance. Why? Because Firefox, Apple, etc could no longer extort Apple to make Google the default when that's what most users want anyway.
Mozilla already tried making Bing the default. They went back to Google eventually, probably because Google paid them, but I would guess the user response was probably negative too. That's just a guess however.
Those of us who are old enough will remember the Microsoft antitrust trial and how that really went nowhere in the end. And that was for something that was profoundly much more harmful. There is such a larger barrier to entry to installing a new browser.
And that's the thing: this will take a decade or longer to actually play out. Any administration in the meantime could not have the same resolve or otherwise choose to settle with Google in some form of consent decree that limits their behaviour for a period of time.
So I don't see this going anywhere realistically.