This is a meaningless nitpick. It’s felony sexual assault. That along with the actual description of what he did is legitimately described as rape in casual conversation, even if that’s not what the formal criminal charge is titled.
I don’t know why you use that tone of exasperation. It’s not like what he did or what he was charged with is significantly less reprehensible than what “rape” signifies in your mind, whether defined by law or not.
He is an actual rapist, for fuck’s sake.