You can achieve this using our Tooltip component with a TargetSelector parameter targeting a path element with an exact attribute within the SVG. For example, a CSS selector targeting a pointer with a specific color. In this case, you can't use data- or title attributes, so the tooltip content itself can't be provided from the node itself. Instead, you can populate the content of the Tooltip from properties for example.
I have attached a sample runnable application that demonstrates this approach.
Please let me know if you need any additional information.