My apology that I re-posted the same question.
I assume that I didn't get any answers since my previous question wasn't clear.
To add some more detail, I understand that you get "cem_matched" variable after running CEM.
If it is 1, then that observation is included in matched samples. If it is 0, then that observation is excluded from matched samples.
My goal is to find which particular treatment id is matched to which particular control id.
By only looking at "cem_matched" output, one can tell whether a particular treatment or control id is included/excluded in matched samples.
More than this, I was wondering if there's any way to find out which one is paired up with which.
When you run PSM, it gives you this kind of outputs.

I searched more and was guessing cem_strata is the one that I'm looking for.
I noticed that if there are treatment ids and control ids who have been assigned the same value of cem_strata, those treatment ids and control ids are the pairs.
I searched on the internet to confirm with this, but couldn't find a desired answer.
Could anyone who are familiar with CEM answer this question?
Thank you.