Should I consider a facelift or will filler be enough to target sagging and lines? 25 y/o

Hello, I am 25 years old and I lost 10 kilos in a month last year. Then I had gaps in various places on my face. I am especially uncomfortable with the line on the edge of the mouth, it makes me look unhappy. In the same way, I have sagging in my neck. Do I need to have surgery because my cheeks are down, should I have an endoscopic middle face lift or will the filling be enough?