Is Sculptra effective for adding volume to the buttocks or pelvis?

As I get older, I can feel my body line changing.

In particular, my buttocks seem to be losing volume and firmness; my hip dips are becoming more noticeable and worsening, and I've lost my pelvic line, so it feels like I'm turning into a straight body.
yo. this

So I'm looking into Body Sculptra. Has anyone here actually tried it?
When I look through dermatology apps or reviews, they are full of posts saying it’s really good. I’m really curious to hear some genuine reviews; is there anyone who experienced side effects or saw absolutely no effect?

I tend to be a bit of a scaredy-cat, so I'm most worried about the pain. Will the pain from Body Sculptra be severe?