[Chartjs]-How to return JSX from a callback in ChartJS?

Short answer: You can’t

Explanation:
Since chart.js is a canvas based library it does not use dom elements to display things on the chart. For this you will need to use a svg library like recharts.

So by default you are bound to what the callback enables you to do. If you want more customization you will need to write a custom plugin that uses the canvas API to draw the things you want on the canvas itself.

https://www.w3schools.com/html/html5_canvas.asp
https://www.chartjs.org/docs/4.2.0/developers/plugins.html