Connected Factory Browse option doesnt let you add an opc ua server uri.
As per the documentation, admins can add a new OPC UA URI in the Browse tab. https://docs.microsoft.com/en-us/azure/iot-accelerators/iot-accelerators-connected-factory-customize#data-sources
However In my solution, I dont see that option. I have installed the Industrial IoT Gateway on my Iot Edge Server and is listed under the Connected factory Iot Hub edge servers with opctwin and opcpublisher modules in it.