The documentation for the react-bootstrap overlay trigger says that the overlay prop can be an element or text. However, whenever I pass it something other than a "Tooltip" component it doesn't work. In fact, if you modify their code example on the website linked below to be just a div instead of a Tooltip or a string, it doesn't work on their site either. Does it have to be passed a Tooltip?
https://react-bootstrap.github.io/components.html#tooltips-overlay-trigger