So with a merge pipeline in Deployment Manager you do not specify a product rule it seems from documentation I have found. If I have a data change that needs to go along with a branch merge to get deployed together how do I include the data change like a data admin db table instance? Normally you would include this in the product rule but since you don’t specify a product rule then that won’t work.
Merge pipeline intended for Merges not for deployments. In case if you wanted to migrate the data changes to other environments you would use Deploy Pipeline.