The 'Party Line' response that I have heard to questions such as this is that the 'larger separations' that you refer to don't exist.
----- Original Message -----
From: "Brian Whatcott" <betwys1@sbcglobal.net>
your note reminds me of this separate question:
As the universe is expanding at an accelerating pace, so that the
"furthest" light we can see is from 13 Bly or thereabouts,
and more distant light never can reach us,
is there an accounting for the mass and dark energy at these
larger separations?