Butt Projection over 50. What procedure that will give me upper and lower fullness and a rounded backside? (Photos)

Hello, I’m 52 six foot tall with a decent figure. I’ve been on a journey trying to round out my figure just for me and my own happiness. I had a BBL initially had the projection however a year later flatten out, I had a little fat to begin with, pulled from my arms, inner thigh and abdomen. I then tried sculpture FDA approved sculpture over 30 vials eight months later flat, no projection.. My last resort has been buttock implants in all transparency, I do work out however I am not a gym rat for firm butt muscles however gave it a try and now have sagging. I’m realistic and I’m not looking for a Kim Kardashian outcome. I would be very happy with the fullness as shown in the picture with the white T-shirt two months after the BBL the photo in the gray shorts is a year after the BBL the first photo is before and the last photo is me today with sagging implants. Can anyone help with a procedure that will give me the upper and lower fullness I’m looking for to rounded backside?