The answer is that, no, nobody akshuarry audits anything. This has been proven time and time again, especially in the last few years.
>All of it gives me a bias towards using official sources from companies like Apple and Google, who presumably hire the talent and institute the processes to do things right.
What you get from commercial vendors is liability, you get to demand they take responsibility because you paid them cold hard cash. Free products have no such guarantees, you are your own liability.
Sooo how about the audits linked in >>42592444 ?