Flutter Cartesian chart widget provides support for customizing the tooltip in the chart using the callback events on rendering. Callback events are callback function or a method, which you pass as an argument into another function or method and can perform an action when you require it. Likewise, the chart widget provides a callback event...

This example demonstrates how to bind the Xamarin Pie Chart Tooltip to Others category values

This example demonstrates how to customize the tooltip arrow length in Xamarin.Forms Charts

Customize the tooltips displayed for TreeList cells.