Inquiry regarding forehead filler volume to improve a flat and curved forehead line

I was born with a flat forehead shape where the bone is prominent and the center is deeply sunken, so I have lived my entire life covering it with bangs. This year, I really want to try a hairstyle where I sweep my bangs back for a refreshing look, but every time I look at my profile, my confidence plummets because of my flat and uneven forehead line. I am wondering if it is possible to create a three-dimensional forehead by smoothly filling in the sunken central area with forehead filler treatment at Maypure. Since the forehead is a large area, I am very worried about potential side effects such as the surface becoming uneven or the filler migrating downwards after the procedure. I would like to consult with you regarding the approximate recommended dosage and the duration of effect for each product, as well as how many cc of filler is typically needed for a forehead with severe curves like mine to create natural volume without looking artificial.