Should be an important task for the FAA to figure out, why the two in row 0 never tried to open the throttle of the other idling engine, when the in their mind "good one" could not keep altitude.
Compared to swim they cold hardly loose. So why both where so task saturated that the simple solution never occurred to them.
They did the first right thing and did not shut the engine down, as other did before and tried to relight it in vain. They where so close in saving the night.
Easy to say from the arm chair, but there is something to learn here.