The point of the unification of space and time in relativity is that there's no sense in asking what's happening "right now" at a different position. It makes as much sense as asking what's happening "right $y$" at a different $x$ in Euclidean geometry. If you fix a Cartesian coordinate system then "right $y$" is mathematically well defined, but being mathematically well defined doesn't make it any more sensible to talk about. The laws of nature don't have any notion of distant simultaneity and don't care about your coordinates.
There are situations in which there's a coordinate-independent, geometric difference between two curves (worldlines) in spacetime that justifies saying that one is shorter (less elapsed proper time) than the other in some absolute sense. One such case is when the curves meet at two spacetime points and you're only interested in the length between those points (as in the twin paradox/effect). Another case is gravitational time dilation, where the curves are analogous to circles of constant latitude on the earth.
Worldlines moving with the Hubble flow are more like lines of constant longitude on the earth. The distance between them varies (as a function of latitude), and as a result if you draw rhumb lines from one of them to another (analogous to lightlike worldlines), they'll arrive at a different separation than they departed at (analogous to red/blueshift). But the situation is symmetric, and it makes no sense to say that one longitude line is longer than another.