i saw somewhere someone editing the energy-distribution as a card, where can i find this?

[acoustic epoch]

i saw somewhere someone editing the energy-distribution to add more entities in a different dashboard. I seem to be able to add it to a dashboard, but changing the content seems not possible.
The example I saw, was it a plugin or is this something from the beta channel?

[neon vale]

I guess you mean the sankey card. It is YAML only. You can find the available options here (and also the other available energy cards):
https://www.home-assistant.io/dashboards/energy/#sankey-energy-graph

[cedar escarp]

It's probably a custom card

There's a few variants that allow for adding extra things to it.

The core card has no configuration options.

(energy distribution is the one with the animated dots)