[4.27.2] How to detect when mouse hovers a widget, even when widget is not visible?

I have several UI widget elements that I want to detect when they are hovered, but they MUST remain Visibility > Not-Hit Testable.
The purpose is to have a tool tip triggering field, that in no way interferes with the clickable buttons beneath it.

I have tried to override the FReply NativeOnMouseMove() and NativeOnMouseLeave() C++ functions, but they are still only called when the widget is visible. Is there a function I can override that allows me to hook into when a widget is hovered regardless of it’s Visibility setting?