To publish feature services that reference your data sources, create maps in ArcGIS Pro that contain the feature data you need in the service. You can then publish a feature service to either a stand-alone or federated ArcGIS GIS Server site.
You can also create a service definition file rather than publish a feature service. Upload the service definition file to ArcGIS Server Manager to publish the feature service there.
Publish from ArcGIS Pro
In an ArcGIS Pro project, create a map that contains the data you want to publish. Register your data sources with one of your portal's federated ArcGIS GIS Server sites or with a stand-alone ArcGIS GIS Server site, and publish a feature layer that references the registered data.
See Web feature layer in the ArcGIS Pro help for instructions to publish a feature layer that references registered data to a federated server. See Publish a map service and Configure a map service for information about publishing a map service with feature access enabled (a feature service) to a stand-alone ArcGIS GIS Server site.
Publish from ArcGIS Server Manager
If you create a service definition file, you can upload that file to Server Manager and publish.