Have you configured the UPS as an upstream device in 1 of the device configurations?
If so, the flowchart will not show rooms anymore, but instead switch to showing upstream devices. Try removing the UPS as an upstream device and see if that helps
I don’t believe there’s another option right now other than removnig the UPS from the individual devices.
You can try to create a feature request (or search for one, not sure if it exists already) on Github, maybe it gets enough traction to get worked on
So it seems it is actually possible to have both floors/area grouping AND upstream devices. That is only possible when you show the sankey graph on a custom dashboard though, not the build in energy one.
Since I have a custom dashboard, I tried this out and I was able to get them to show up as you wanted, by manually forcing the grouping on area/floor as well (using the YAML code in the other post)
Its around 50W in my case. Looks like that as total cosumption at tome of taking that screenshot was aroun 150W. Those 50W left are some small stuff like phone chargers, docking stations, monitors at idle state etc. What really bothers me is that UPS path crossing other paths. It still could be between hallway and living room. Perhaps it will be fixed one day.