On a desktop device the tooltip is shown when the mouse enters the data point's visual element. On touch device the tooltip should be displayed when you tap (or tap and hold) on the visual element. Currently, this doesn't work. To work this around you can implement custom tooltip behavior using RadToolTip and TouchManager. https://docs.telerik.com/devtools/wpf/controls/radtooltip/overview https://docs.telerik.com/devtools/wpf/controls/touchmanager/overview
Hi, The feature will be available in our next official version – R3 2018, scheduled for the middle of September. Best regards, Ralitsa Kumanova