Whistleblowing seems to be where everyone's faith is these days. Training people on whistleblowing is supposed to be an internal matter. By that I mean companies can have whistleblowing programs to identify problems proactively. This is generally how the US military (and the government more widely) use theirs. This should shield the company from responsibility if they at least attempt to act, not to mention it would probably buy trust from the public.
I've worked in big tech for a bit now and I've seen a lot of open door policies, but never a whistleblower program.