Only a year after Clinton signed the statute 9/11 was perpetrated. I can’t imagine any of the most powerful countries would have ratified it if they were in the midst of prosecuting a war.
Since then the US has softened on the ICC as it benefits them to maintain a relationship but, at this point why sign other than for ideological reasons.
And even if there was an intent to join there would likely be stipulations from the US. And it would have to pass the divided senate, after which it would likely go to the Supreme Court who with the current bench would certainly strike it down, meaning a constitutional amendment would be needed. It’s less feasible to join now than it ever has been unfortunately.