Please help me understand the cause of this and how I can fix it via means of surgery

[crazyaye]

Now, I understand that it is most likely my hyoid but I just feel so discouraged because even recessed people have some space underneath their jaw. I've already posted about this and people have told me to get bimax/trimax which will happen but I just need help finding out what the issue is. Is it a low hyoid? Is it a recessed mandible? Chin? Combination of both? It just sucks because I literally know no one with this much of a problem.