I'm doubtful Gail Slater will have anywhere near the ferocity of Lina Khan. Doubly so, since Trump is hellbent on appointing loyalists, and has big tech is scrambling to be all in with him for his second term. I mean, look at Meta's hard turn.
As long as heads of tech companies are willing to praise Trump and/or line his pockets, they'll likely not be investigated. Thus, I think this is the real reason for Yen's unneeded statement yesterday.
https://thehill.com/policy/technology/5022586-trump-names-slater-antitrust-division-leader/