The way to divide up Google is into the ad network, the search engine, operating systems, and everything else. Allow them to contract each other on public FRAND terms to start with, but setup annual reviews to consider a bigger hammer.

If they play games with moving house to avoid jurisdiction, ban payments to and from them.

It's in Warren's program, although of course the devil is in the details. Lina Khan is the thought leader on these issues (I am sure there are others, but like Hal Varian and Carl Shapiro, they tend to get coopted by the monopolists).

And if they don't comply? Fairly simple. Indictments. Raids. Arrests. Asset seizures. Public shaming of employees and executives working for the company. Etc.

Companies have outsized power these days imo, but they still aren't at the point to compete with the United States military and resist the actual violence that be visited on their assets if they do not comply

This happens all the time in the space industry lol.