Allow me to answer your question as best i can based upon your photos. However, please keep in mind that an in-person, or at least a virtual, consultation with physical exam is first necessary before any legitimate evaluation or final surgical recommendations can be made. Although you will likely get a lot of replies suggesting subcision release and fat grafting, I have found this to work quite poorly. As long as the patient is willing to have a more full perky buttock, in my experience, the only predictable long-term results option is to place buttock implants. Please note that an extremely few number of board certified plastic surgeons specialize in buttock or hip implants, so you may need to travel far and away from home to find this particular surgeon. Getting it done right the first time around is not only the best chance for success, but also will save you from a lot of headaches and money in the future. Glad to help.