Yes, it is still present in Release 1.14.4 and in Snapshot 19w46b Pressing F11, toggling full screen, causes the visual cursor to disappear. You can still select UI elements, but it's like trying to find them blind-folded. Edit: I apologize for the late reply; I actually had kind of forgotten about the report until I was scrolling through my email this afternoon.
Uh, no, I didn't post a feature request; I was under the impression from information from several sources that arrow key navigation of the menu system had been added to the Accessibility features of Minecraft in 1.14. I merely submitted a bug report based on information that I had, as the above feature I was under the impression had been implemented wasn't working.
Maybe this should be made more prominent, then?