I believe this is a bug in the new Sunstone web UI. I’m using release v6.10.0.
As a new users I was a bit confused trying to create my 1st Service template with a Dynamic Network Template to be created at run time.
It appears to me that the service-template network “Create” Type is giving only the existing “networks” in the pull down. It should be showing the available Network Templates.
As a confused new user not understanding how to call the template, I went to the Old UI and then it was clear - there the templates are shown in the pick list.
Screen shots below.
Thought to pass this along with hopes it can be fixed in future release.