When publishing to an internally housed server, you can eventually work your way back from the FeatureLayer all the way to the publishing source. ArcGIS Server Manager tracks all of the supporting Pro locations for each service. So, if you happen to forget to write extensive notes on the FeatureLayer Details tab, you can still track back to the publishing project.
When you publish to ArcGIS Online (Hosted), the FeatureLayer does not track the source project. I have since been updating my Details tab (when I remember) to include this information, but A. sometimes I forget, and B. It would be nice if it just tracked automatically.