ADDITIONAL SYSTEM INFORMATION :
openjfx 17.0.1

A DESCRIPTION OF THE PROBLEM :
When debugging my JavaFX user interaction code, I type a key, and my code stops in a key handler, which has a breakpoint set in it; now I can look around at things. So far so good. But what would be really convenient would be if before reaching the breakpoint, my code could make a note of the target node under the cursor, so I can inspect it easily. And in case that node doesn’t consume one of the mouse events, it would also be nice to have a list of the other objects under it.

See
JDK-8091684 : FX should provide a Parent.pick() routine
JDK-8102426 : Make impl_pickNode public