No. Any theatres that projected From Here to Eternity at 1.85:1 were likely cropping top and bottom of the 1.37:1 image on the film.
As for the film being in 3-channel stereo, it is possible (although the restoration notes indicate otherwise) and if so, that mix has likely gone missing like all...
That is considered a bonus disc exclusive to the boxed set. A summary review will be posted once I post all six movie reviews, as I have done with the previous two volumes.