Panel Resize Handle (size increase)

I'd like to request the ability to resize the slider shown in the attached screenshot.

I use a 34-inch ultrawide monitor at a resolution of 3440 × 1440, and the current slider is extremely small at that scale. It often takes several seconds just to position my cursor precisely over the handle before I can drag it.

An option to increase the slider's size—or simply enlarge its draggable handle—would be a significant usability improvement for anyone using high-resolution or ultrawide displays.