Curiosities about the Jubelook effect (Jubelook Skin? Jubelook Volume?)

I am leaving an inquiry because I have some questions about the effects and types of Juvenlook.

I was looking into skin boosters because I was concerned about the sunken appearance of my under-eyes and the fine lines, but then I became interested in the Juvelook procedure. The effects I am looking for are improved under-eye hollowness, elasticity, and fine lines, and I would like to know if this is possible with the Juvelook procedure.

It seems there are several types of Juvelook. There is Juvelook Skin and Juvelook Volume, and I am curious about the exact difference between the two. Among the Juvelook treatments, Juvelook Volume appears to be effective for adding volume to the skin; does Juvelook Volume also have an effect on reducing fine lines?

And fillers maintain volume by leaving the filler components in the skin, right? I'm also curious about the principle by which Juvelook Volume adds volume to sunken areas.