Are there plans to add a chart/graph widget in the future? Or does this functionality and I cannot work out how to do it on the experience builder? Similar sort of charts/graphs you can make in ArcGIS Dashboards. I also note that the ArcGIS Web App Builder has a chart widget.
I have also seen examples of experiences that have this functionality but I'm unsure how they got the widget:
We do have charts listed as something we would like to add in a future release. The experiences that you saw were designed with embedding Operations Dashboard components. You can find out more information here: Two dashboards, one intelligent URL