Maybe 2016 version is different enough that I don't get this
to create a new form, the new form does not show up in the Object list
What "the new form"? If that's a form you just created and want to copy, are you sure you saved it? I'm guessing the "object list" is the nav pane? Is it a saved form that is open (because it has to be open)?
Maybe accurately describe the steps you're taking because I can't replicate the issue in 2016 either.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.