Add a hoveron for lines+points and having marker height and width style

I've made a codepen so you can understand what I'm asking for

https://codepen.io/philhendry/pen/xxMeQpJ

Ideally I'd like to make all the horizontal lines clickable here, I dont want to use closest to find the closest point.

I know I can achieve this if the hoveron works for lines and points if i can set it to be hlines or vlines or hvlines so i have control over which lines have a spanning on the x axis, or if i can manipulate the width of the markers so they can start and end at the hvh start and end

If anyone has a work around or a fix that would be great, but i think this should be a feature

Start by reproducing the behavior in the linked CodePen and read the existing hoveron, line, point, and marker documentation or entry points it references. The request needs a settled interaction design before implementation; done would mean horizontal lines can be targeted as described and marker dimensions support the intended spanning behavior, with coverage for the agreed cases.