This has already been discussed extensively in prior threads, but the biggest question is, how does a spun-off Chrome get funded? Chrome/Firefox/Safari all cost hundreds of millions of dollars a year to maintain. Currently, Safari and Firefox both make essentially all their revenue through default search agreements. Chrome, Edge, and now Brave are produced by companies that also own the search engines, so they're ess…
* Only operating system vendors can ship web browsers. (But not Google.)
The USG in general seems to love giving Apple more monopoly power. This will effectively constrain browser development to just Apple and Microsoft, since as you note, the DOJ is also trying to regulate Firefox out of existence; and Apple has huge incentives to simply pause browser feature development (and has been dragging its feet on Safari for years).
Incredibly, this will also hamstring Android even further, since its parent company can't even make a web browser for it anymore! Only Apple, the Biden administration's favorite company, can do that kind of thing.