There is no dispute. Boeing Technical pilot Mark Forkner asked and got the FAA to agree that MCAS wouldn't be included in the pilot's manuals. He succeeded, and, in his own words, used "Jedi mind tricks" to convince other regulators to do the same. Apparently the Brazilians are more resistant to Jedi mind tricks. Later, MCAS was modified to work at low speed and altitude, giving it more trimming authority, surprising even Forkner, who complained about not being given that information, but the FAA was not informed about the changes. These are all well documented events.