In AGP 2.6.3, when creating a new FC, please implement functionality to import fields from shapefiles. This functionality is present in ArcMap 10.7.1. But in AGP, the import window only shows Tables and GDB FCs are eligible for importing fields. Without this functionality, users have to add the steps to import a shapefile to a GDB FC, then when we create a FC the fields can be imported.
BTW, I contacted Esri Tech Support, they were able to reproduce this functionality.