As was pointed out to me earlier, I didn't have the hosting model added, which I do now.
In doing the build of the source code: Angular ng build and the output directory is set to /API (the dotnet core 6 project). This makes wwwroot at the top level /API folder - just seems to me, it should be in the API/bin/Release/Net6.0 directory ??? <<what do you think.
In Visual Studio 2019 API (core) directory, I selected Build -> Publish API -> where to: IIS, then selected Web Deploy (? not sure if web deploy package is what I should have done), Server - this machine so "localhost", sitename is TUtil as shown in IISMgr. I left the rest empty. (Not sure what destination URL is for).
Validate Connection button fails with Unable to connect: Service Url should not be empty. ??? Lost where is that.
Thanks advance. Chuck