When I tried to deploy a XF app to Lumia 950 I got the following error message:
DEP6957: Failed to connect to device '127.0.0.1' using Universal Authentication. Please verify the correct remote authentication mode is specified in the project debug settings. DeviceException - DEP6711: Deployment to Windows Mobile devices is not supported in Visual Studio 2019. [0x80131500]
Let me know if I am doing something wrong.