This is my concern. They have me down for lower only and I know I will only be able to get a similar movement that way, and I feel that I need more
Your xray looks very similar to mine. As a girl you might get away with a slightly recessed look but it would probably still suck.
Consult with other surgeons. I consulted with 2 and that wasnt enough
You can easily simulate the result of a lower jaw advancement for yourself. Just push your lower jaw forward with relaxed lips. This is 95% the result you will get.
The surgeons persuaded me that it would look better ie less recessed. But that did not happen. Dont get fooled like me.