How likely will Trump DOJ drop this? Consumers have choice, albeit just a handful of credible options. Nobody is forced to use Chrome (unlike MSFT pushing IE back in the day)
Trumpers in the GOP hate Big Tech too, but their concerns are exclusively about censorship of conservatives (for Google) and domestic manufacturing (for Apple). Market competition is not their framework. Gaetz is in that group, but he's also a moron who doesn't care about policy details.
If he's smarter than I think, then expect him to go after Google Search (the alleged source of anti-conservative bias). But if he's as dumb as I think, expect him to support the Chrome breakup, even though it would not advance his goals and wouldn't be coherent antitrust policy, because it would let him claim a "win".