In Kendo angular you can tell the tooltips to flip when they collide with the edge of the viewport:
A problem with angular is it can't detect a collision in both directions. In the above example, the top tooltip only flips downwards but not to the right.
As for Kendo React there is less control. It seems to always want to "fit" with no option to flip when a collision happens. I have prepared 3 examples below. for position left, right and default: