It seems it would be consistent to make it possible to provide the ability to both duplicate and copy a section in the experimental Sections view. Currently, I see no way to do this other than editing in YAML, selecting all, creating a new section, edit it in YAML and then paste.
I realize that it can probably only ever paste a grid as it seems apparent that a section must always be a grid. However, I expect that this shouldn’t be hard to do as it is not uncommon to copy something in general on an OS or browser and not be able to paste it in specific situations because it is not the right type.
Even if it is not possible to check that it is a grid but maybe only that it is just text this should still be fine as if you don’t paste a grid the sections displays an error text message in place of the section. I have tested this.