Hi,
You can use the Anychart widget, the module also has building blocks with sample data. https://marketplace.mendix.com/link/component/106517
For grouped bar chart check the JSON sample here https://plotly.com/javascript/bar-charts/#grouped-bar-chart-with-direct-labels
Thanks!
I should have updated my post. The simple answer was that I needed a series for each bar. I was able to get it to work without using Any Chart (and therefore avoided JSON).
Next goal will be to figure out how to make it dynamic.