Standardizing Units for Measurement

I would like to know what is the situation on the ideas in this post.

On the top, it was suggested that the recommended unit will be added to concept_relationship and this will be added to the CDM documentation

Has this happened, and I’m not finding it, or this was now implemented ?

Current documentation is not suggesting this OMOP CDM v5.4

(i arrived here through this post Harmonizing measurement numeric values and units)

Thanks