I’ve been working on similar functionality for my Repeater Tabs plugin, updated today with the working code.
It’s only been tested on my own use-cases, but works so far with Standard and 1-child-deep nested Repeater Fields.
Hover over the tabs to get the “COPY” option.
More details are in the readme.
Hope this helps, maybe even with developing John’s further.
https://github.com/JamesParkNINJA/acf-repeater-tabs
