Morgans writes:

In airliners, all you have to do is change the cabin altitude pressure
setting, and you can do the same thing, and they do occasionally do this on
(especially on) oceanic red-eyes.

You can only go to 8000 in (most) airliners.

They don't have to go all that high to have a noticeable effect, but it does
make it easy for the flight attendants.

Only if the FAs are wearing oxygen masks.