Or maybe not.
I think the universe's 'structural decay' might be a measure of time as good for a different
context as radioactive decay is for our local time uses ...if we had the data...but we don't

And after all, "absolute time" is just a time with a higher level of authority than "relative time" in a particular instance. For example,
relative time might govern an informal discussion in a school classroom. But when the bell rings,
it doesn't matter how beneficial the discussion was...kids have to go to their next class.
So in this sense, clock time is absolute time.
Yet in physics, we say clock and calendar time derives from solar system time and
things like radioactive decay.

Yet these might be inadequate for keeping track of special non-local cases, and doesn't appear to
measure the widest time we know. We don't have a calendar for the decay of the universe's structure.
So... more likely, we have no use for universal time yet and so there is no such thing. However, for cosmological wondering, we wonder if anything
would enable superluminal (haha, he said superluminal) communications. Time would be an element in this.
I'll save some of my thoughts to form a response to whatever you might reply.

Sincerely,
Mike