I am not aware of how the system works, but shouldn't authorities voluntarily (don't know the legal term) investigate this case even though there is no official complaint?
There is victim's statement out in the open right?
I'm not a lawyer, but sexual harassment is usually a civil offense, not a criminal offense.
Corporations like Uber universally coerce their servants to sign away their rights to litigation. The only mechanism they have is arbitration, chosen by the corporation.
Most of this would be a civil matter and not criminal.