echarts definitely supports sankey: https://echarts.apache.org/examples/en/index.html#chart-type...

they are missing the mark by not featuring it in their demo. The us national budget comes to mind as a feature clip in the demo for sankey.

I don’t get what you mean, it is featured in the demo. On the landing page, click demo and navigate to sankey in the menu.

sorry, I didn't see it in their featured demo video, unless it was shown supper quick.

It's not in the demo video, but it's in the demo gallery. That's also the thing that's linked as "demo" on the landing page, so I thought you were talking about that.