Hello Sam,
If you are looking into the SA table, then I'm guessing that it is either a basic entity or a fuzzy one but for which you are processing golden via authoring.
If so, in both cases, there is no consolidation, so setting the enricher as post-consolidation will lead to the enricher not being triggered.
I would advise you to put it as pre-consolidation instead.
Sam BRENNAN
I want to create an enricher to default the date when null on an Always Authored in MDM Column on and ID Matched entity
Entity: SourceUsers