Defining a WFS graphical source is done in the same way as any other graphical source. Let's review:
In the Bentley Geospatial Administrator, navigate to the Graphical Sources node.
Right click OGC WFS Connection, and choose Add > New
In the Build Connection dialog, enter a Connection Name and fill in the required Connection Parameters.
Click Test to ensure the connection is valid.
Right click the new WFS connection node and choose Register Features.
In the Register Features dialog, select which features to register and specify settings in the wizard.
Once registered, the features will be added to the Features node.
Define the appropriate symbology, insert placement metadata, and update the Command Manager.
Save and export your project.