I can not add much.
I can see that some circuit has been replicated, and that the Replicate layout plugin does “something”. But from a static screenshot there is no telling whether you’ve bumped into a bug, or are using the script in the wrong way.
Maybe it helps a bit if you post a screenshot of the schematic part to be replicated. That gives us a better Idea of what sort of circuit it is.
I only used the Replicate Layout plugin once, and it was just for some experiments and to see what it was and how it worked. It worked fine for me, but that was some time ago. Maybe KiCad V5.1.5. Last time I tried to run the plugin, it was gone, and I did not investigate whether it was some directory issue, or whether I may have uninstalled the script. For those kind of things I’m patiently waiting for the plugin manager in KiCad-nightly V5.99. Just let KiCad handle it with a few mouse clicks from me.
When I used the Replicate Layout plugin, I followed the instructions from the PDF that Dave Thomas made: