Does under-eye filler help improve dark circles as well?

I am wondering if simply filling in the sunken areas improves dark circles.

When the color itself is dark and
I've also heard that the cases where shadows form due to sunken under-eyes are different.

In my case, it is difficult for me to judge on my own which side it is.

If you get fillers, due to the characteristics of the under-eye area
I think choosing the right practitioner is important, and accurately assessing the condition during the consultation should be the priority.

If there are actually people who feel their impression has brightened after receiving under-eye fillers,
I am curious to know what has changed the most.